tmpfiles: always recreate the most basic directory structure in /var

Let's allow booting up with /var empty. Only create the most basic
directories to get to a working directory structure and symlink set in
/var.

Makefile.am

@@ -1725,7 +1725,8 @@ dist_tmpfiles_DATA = \
 	tmpfiles.d/systemd.conf \
 	tmpfiles.d/systemd-nologin.conf \
 	tmpfiles.d/tmp.conf \
-	tmpfiles.d/x11.conf
+	tmpfiles.d/x11.conf \
+	tmpfiles.d/var.conf
 
 if HAVE_SYSV_COMPAT
 dist_tmpfiles_DATA += \

src/tmpfiles/tmpfiles.c

@@ -750,7 +750,7 @@ static int create_item(Item *i) {
                 }
 
                 if (!streq(i->argument, x)) {
-                        log_error("%s is not the right symlinks.", i->path);
+                        log_error("%s is not the right symlink.", i->path);
                         return -EEXIST;
                 }
 

tmpfiles.d/legacy.conf

@@ -11,6 +11,7 @@
 # systems.
 
 d /run/lock 0755 root root -
+L /var/lock - - - - ../run/lock
 
 # /run/lock/subsys is used for serializing SysV service execution, and
 # hence without use on SysV-less systems.

tmpfiles.d/systemd.conf

@@ -10,11 +10,6 @@
 d /run/user 0755 root root ~10d
 F! /run/utmp 0664 root utmp -
 
-f /var/log/wtmp 0664 root utmp -
-f /var/log/btmp 0600 root utmp -
-
-d /var/cache/man - - - 30d
-
 d /run/systemd/ask-password 0755 root root -
 d /run/systemd/seats 0755 root root -
 d /run/systemd/sessions 0755 root root -

tmpfiles.d/var.conf

@@ -0,0 +1,20 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+# See tmpfiles.d(5) for details
+
+L /var/run - - - - ../run
+
+d /var/log 0755 - - -
+f /var/log/wtmp 0664 root utmp -
+f /var/log/btmp 0600 root utmp -
+
+d /var/cache 0755 - - -
+d /var/cache/man - - - 30d
+
+d /var/lib 0755 - - -
+d /var/spool 0755 - - -