tests: add spdx license header to test unit/link/network/conf files

Those are all consumed by our parser, so they all support comments.
I was considering whether they should have a license header at all,
but in the end I decided to add it because those files are often created
by copying parts of real unit files. And if the real ones have a license,
then those might as well. It's easier to add it than to make an exception.

test/test-execute/exec-ambientcapabilities-merge-nfsnobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for AmbientCapabilities
 

test/test-execute/exec-ambientcapabilities-merge-nobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for AmbientCapabilities
 

test/test-execute/exec-ambientcapabilities-merge.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for AmbientCapabilities (daemon)
 

test/test-execute/exec-ambientcapabilities-nfsnobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for AmbientCapabilities
 

test/test-execute/exec-ambientcapabilities-nobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for AmbientCapabilities
 

test/test-execute/exec-ambientcapabilities.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for AmbientCapabilities (daemon)
 

test/test-execute/exec-basic.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for basic execution
 ConditionKernelVersion=">=3.0"

test/test-execute/exec-bindpaths.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for BindPaths= and BindReadOnlyPaths=
 

test/test-execute/exec-capabilityboundingset-invert.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for CapabilityBoundingSet
 

test/test-execute/exec-capabilityboundingset-merge.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for CapabilityBoundingSet
 

test/test-execute/exec-capabilityboundingset-reset.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for CapabilityBoundingSet
 

test/test-execute/exec-capabilityboundingset-simple.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for CapabilityBoundingSet
 

test/test-execute/exec-condition-failed.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for exec condition that fails the unit
 

test/test-execute/exec-condition-skip.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for exec condition that triggers skipping
 

test/test-execute/exec-cpuaffinity1.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for CPUAffinity (simple)
 

test/test-execute/exec-cpuaffinity2.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for CPUAffinity (reset)
 

test/test-execute/exec-cpuaffinity3.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for CPUAffinity (merge)
 

test/test-execute/exec-dynamicuser-fixeduser-adm.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser with static User= whose uid and gid are different
 # On Fedora, user adm has uid==3 and gid==4.

test/test-execute/exec-dynamicuser-fixeduser-games.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser with static User= whose uid and gid are different
 # On Ubuntu or Debian, user games has uid==5 and gid==60.

test/test-execute/exec-dynamicuser-fixeduser-one-supplementarygroup.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser with User= and SupplementaryGroups=
 

test/test-execute/exec-dynamicuser-fixeduser.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser with User=
 

test/test-execute/exec-dynamicuser-runtimedirectory1.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for RuntimeDirectory with RuntimeDirectoryPreserve=yes and DynamicUser=yes
 

test/test-execute/exec-dynamicuser-runtimedirectory2.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for RuntimeDirectory with RuntimeDirectoryPreserve=yes and DynamicUser=yes 2nd trial
 

test/test-execute/exec-dynamicuser-runtimedirectory3.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for RuntimeDirectory with DynamicUser=yes migrated from RuntimeDirectoryPreserve=yes
 

test/test-execute/exec-dynamicuser-statedir-migrate-step1.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser= migrate StateDirectory= (preparation)
 

test/test-execute/exec-dynamicuser-statedir-migrate-step2.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser= migrate StateDirectory=
 

test/test-execute/exec-dynamicuser-statedir.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser= with StateDirectory=
 

test/test-execute/exec-dynamicuser-supplementarygroups.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test DynamicUser with SupplementaryGroups=
 

test/test-execute/exec-environment-empty.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Environment
 

test/test-execute/exec-environment-multiple.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Environment
 

test/test-execute/exec-environment-no-substitute.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for No Environment Variable Substitution
 

test/test-execute/exec-environment.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Environment
 

test/test-execute/exec-environmentfile.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for EnvironmentFile
 

test/test-execute/exec-execsearchpath-environment-path-set.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Service]
 ExecStart=/bin/sh -x -c 'test "$$PATH" = "/usr" && test "$$VAR1" = word3 && test "$$VAR2" = "\\$$word 5 6"'
 Type=oneshot

test/test-execute/exec-execsearchpath-environment.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Service]
 ExecStart=/bin/sh -x -c 'test "$$VAR1" = "word1 word2" && test "$$VAR2" = word3 && test "$$VAR3" = "\\$$word 5 6" && test "$$PATH" = "/tmp:/bin"'
 Type=oneshot

test/test-execute/exec-execsearchpath-environmentfile-set.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for ExecSearchPath with EnvironmentFile where EnvironmentFile sets PATH
 

test/test-execute/exec-execsearchpath-environmentfile.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for ExecSearchPath with EnvironmentFile where EnvironmentFile does not set PATH
 

test/test-execute/exec-execsearchpath-passenvironment-set.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PassEnvironment with ExecSearchPath with PATH set by user
 

test/test-execute/exec-execsearchpath-passenvironment.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PassEnvironment with ExecSearchPath with PATH not set by user
 

test/test-execute/exec-execsearchpath-unit-specifier.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for specifiers with exec search path
 

test/test-execute/exec-execsearchpath.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Service]
 ExecStart=ls_temp
 Type=oneshot

test/test-execute/exec-group-nfsnobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Group
 

test/test-execute/exec-group-nobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Group
 

test/test-execute/exec-group-nogroup.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Group
 

test/test-execute/exec-group.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Group (daemon)
 

test/test-execute/exec-ignoresigpipe-no.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for IgnoreSIGPIPE=no
 

test/test-execute/exec-ignoresigpipe-yes.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for IgnoreSIGPIPE=yes
 

test/test-execute/exec-inaccessiblepaths-mount-propagation.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test to make sure that InaccessiblePaths= disconnect mount propagation
 

test/test-execute/exec-inaccessiblepaths-sys.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test to make sure that mount namespace setup works properly with the 'InaccessiblePaths=/proc' option
 

test/test-execute/exec-ioschedulingclass-best-effort.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for IOSchedulingClass=best-effort
 

test/test-execute/exec-ioschedulingclass-idle.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for IOSchedulingClass=idle
 

test/test-execute/exec-ioschedulingclass-none.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for IOSchedulingClass=none
 

test/test-execute/exec-ioschedulingclass-realtime.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for IOSchedulingClass=realtime
 

test/test-execute/exec-mount-apivfs-no.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for find_executable() with MountAPIVFS=no
 

test/test-execute/exec-noexecpaths-simple.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for NoExecPaths=
 

test/test-execute/exec-oomscoreadjust-negative.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for OOMScoreAdjust
 

test/test-execute/exec-oomscoreadjust-positive.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for OOMScoreAdjust
 

test/test-execute/exec-passenvironment-absent.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PassEnvironment with variables absent from the execution environment
 

test/test-execute/exec-passenvironment-empty.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PassEnvironment and erasing the variable list
 

test/test-execute/exec-passenvironment-repeated.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PassEnvironment with a variable name repeated
 

test/test-execute/exec-passenvironment.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PassEnvironment
 

test/test-execute/exec-personality-aarch64.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Personality=aarch64
 

test/test-execute/exec-personality-ppc64.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Personality=ppc64
 

test/test-execute/exec-personality-ppc64le.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Personality=ppc64le
 

test/test-execute/exec-personality-s390.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Personality=s390
 

test/test-execute/exec-personality-x86-64.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Personality=x86-64
 

test/test-execute/exec-personality-x86.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for Personality=x86
 

test/test-execute/exec-privatedevices-disabled-by-prefix.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PrivateDevices=yes with prefix
 

test/test-execute/exec-privatedevices-no-capability-mknod.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_MKNOD capability for PrivateDevices=no
 

test/test-execute/exec-privatedevices-no-capability-sys-rawio.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_SYS_RAWIO capability for PrivateDevices=no
 

test/test-execute/exec-privatedevices-no.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PrivateDevices=no
 

test/test-execute/exec-privatedevices-yes-capability-mknod.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_MKNOD capability for PrivateDevices=yes
 

test/test-execute/exec-privatedevices-yes-capability-sys-rawio.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_SYS_RAWIO capability for PrivateDevices=yes
 

test/test-execute/exec-privatedevices-yes-with-group.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test Group=group is applied after PrivateDevices=yes
 

test/test-execute/exec-privatedevices-yes.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PrivateDevices=yes
 

test/test-execute/exec-privatenetwork-yes.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PrivateNetwork
 

test/test-execute/exec-privatetmp-disabled-by-prefix.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PrivateTmp=yes with prefix
 

test/test-execute/exec-privatetmp-no.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PrivateTmp=no
 

test/test-execute/exec-privatetmp-yes.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for PrivateTmp=yes
 

test/test-execute/exec-protecthome-tmpfs-vs-protectsystem-strict.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test ProtectHome=tmpfs vs ProtectSystem=strict
 # Test for #11276

test/test-execute/exec-protectkernellogs-no-capabilities.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_SYSLOG for ProtectKernelLogs=no
 

test/test-execute/exec-protectkernellogs-yes-capabilities.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_SYSLOG for ProtectKernelLogs=yes
 

test/test-execute/exec-protectkernelmodules-no-capabilities.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_SYS_MODULE ProtectKernelModules=no
 

test/test-execute/exec-protectkernelmodules-yes-capabilities.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test CAP_SYS_MODULE for ProtectKernelModules=yes
 

test/test-execute/exec-protectkernelmodules-yes-mount-propagation.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test to make sure that passing ProtectKernelModules=yes disconnect mount propagation
 

test/test-execute/exec-readonlypaths-mount-propagation.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test to make sure that passing ReadOnlyPaths= disconnect mount propagation
 

test/test-execute/exec-readonlypaths-simple.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for ReadOnlyPaths=
 

test/test-execute/exec-readonlypaths-with-bindpaths.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for ReadOnlyPaths=
 

test/test-execute/exec-readonlypaths.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for ReadOnlyPaths=
 

test/test-execute/exec-readwritepaths-mount-propagation.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test to make sure that passing ReadWritePaths= disconnect mount propagation
 

test/test-execute/exec-restrictnamespaces-merge-all.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test merging RestrictNamespaces= with all flags
 

test/test-execute/exec-restrictnamespaces-merge-and.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test merging RestrictNamespaces= with AND
 

test/test-execute/exec-restrictnamespaces-merge-or.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test merging RestrictNamespaces= with OR
 

test/test-execute/exec-restrictnamespaces-mnt-deny-list.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test RestrictNamespaces=~mnt
 

test/test-execute/exec-restrictnamespaces-mnt.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test RestrictNamespaces=mnt
 

test/test-execute/exec-restrictnamespaces-no.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test RestrictNamespaces=no
 

test/test-execute/exec-restrictnamespaces-yes.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test RestrictNamespaces=yes
 

test/test-execute/exec-runtimedirectory-mode.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for RuntimeDirectoryMode
 

test/test-execute/exec-runtimedirectory-owner-nfsnobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for RuntimeDirectory owner (must not be the default group of the user if Group is set)
 

test/test-execute/exec-runtimedirectory-owner-nobody.service

@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 [Unit]
 Description=Test for RuntimeDirectory owner (must not be the default group of the user if Group is set)