config: regenerate configure.in to accomodate all recent changes

Hopefully closer to the ideal.

conf/example.conf.in

@@ -4,6 +4,17 @@
 #
 # Refer to 'man lvm.conf' for further information including the file layout.
 #
+# Refer to 'man lvm.conf' for information about how settings configured in
+# this file are combined with built-in values and command line options to
+# arrive at the final values used by LVM.
+#
+# Refer to 'man lvmconfig' for information about displaying the built-in
+# and configured values used by LVM.
+#
+# If a default value is set in this file (not commented out), then a
+# new version of LVM using this file will continue using that value,
+# even if the new version of LVM changes the built-in default value.
+#
 # To put this file in a different directory and override @DEFAULT_SYS_DIR@ set
 # the environment variable LVM_SYSTEM_DIR before running the tools.
 #
@@ -128,8 +139,7 @@ devices {
 	# Example:
 	# Use anchors to be very specific.
 	# filter = [ "a|^/dev/hda8$|", "r|.*/|" ]
-	# This configuration option does not have a default value defined.
-	# filter = []
+	# filter = [ "a|.*/|" ]
 
 	# Configuration option devices/global_filter.
 	# Limit the block devices that are used by LVM system components.
@@ -138,8 +148,7 @@ devices {
 	# and lvmetad. Use global_filter to hide devices from these LVM
 	# system components. The syntax is the same as devices/filter.
 	# Devices rejected by global_filter are not opened by LVM.
-	# This configuration option does not have a default value defined.
-	# global_filter = []
+	# global_filter = [ "a|.*/|" ]
 
 	# Configuration option devices/cache_dir.
 	# Directory in which to store the device cache file.
@@ -336,7 +345,7 @@ allocation {
 	# MD device signatures, swap signature, and LUKS signatures.
 	# To see the list of signatures recognized by blkid, check the
 	# output of the 'blkid -k' command.
-	use_blkid_wiping = 1
+	use_blkid_wiping = @DEFAULT_USE_BLKID_WIPING@
 
 	# Configuration option allocation/wipe_signatures_when_zeroing_new_lvs.
 	# Look for and erase any signatures while zeroing a new LV.
@@ -492,7 +501,7 @@ log {
 	# Configuration option log/activation.
 	# Log messages during activation.
 	# Don't use this in low memory situations (can deadlock).
-	# activation = 0
+	activation = 0
 
 	# Configuration option log/debug_classes.
 	# Select log messages by class.
@@ -502,8 +511,7 @@ log {
 	# memory, devices, activation, allocation,
 	# lvmetad, metadata, cache, locking, lvmpolld.
 	# Use "all" to see everything.
-	debug_classes = ["memory", "devices", "activation", "allocation",
-			 "lvmetad", "metadata", "cache", "locking", "lvmpolld"]
+	debug_classes = [ "memory", "devices", "activation", "allocation", "lvmetad", "metadata", "cache", "locking", "lvmpolld" ]
 }
 
 # Configuration section backup.
@@ -600,7 +608,7 @@ global {
 	# The LVM1 tools need to be installed with .lvm1 suffices,
 	# e.g. vgscan.lvm1. They will stop working once the lvm2
 	# on-disk metadata format is used.
-	# fallback_to_lvm1 = 0
+	# fallback_to_lvm1 = 1
 
 	# Configuration option global/format.
 	# The default metadata format that commands should use.
@@ -856,12 +864,12 @@ global {
 	# ignorable errors and fix them later.
 	# With thin_check version 3.2 or newer you should add
 	# --clear-needs-check-flag.
-	# thin_check_options = ["-q", "--clear-needs-check-flag"]
+	# thin_check_options = [ "-q" ]
 
 	# Configuration option global/thin_repair_options.
 	# List of options passed to the thin_repair command.
 	# This configuration option does not have a default value defined.
-	# thin_repair_options = ""
+	# thin_repair_options = [ ]
 
 	# Configuration option global/thin_disabled_features.
 	# Features to not use in the thin driver.
@@ -904,12 +912,12 @@ global {
 
 	# Configuration option global/cache_check_options.
 	# List of options passed to the cache_check command.
-	# cache_check_options = "-q"
+	# cache_check_options = [ "-q" ]
 
 	# Configuration option global/cache_repair_options.
 	# List of options passed to the cache_repair command.
 	# This configuration option does not have a default value defined.
-	# cache_repair_options = ""
+	# cache_repair_options = [ ]
 
 	# Configuration option global/system_id_source.
 	# The method LVM uses to set the local system ID.
@@ -925,12 +933,12 @@ global {
 	# 'local' section of an lvm configuration file, e.g. lvmlocal.conf.
 	# uname - Set the system ID from the hostname (uname) of the system.
 	# System IDs beginning localhost are not permitted.
-	# machineid - Use the contents of the file @CONFDIR@/machine-id to set the
+	# machineid - Use the contents of the machine-id file to set the
 	# system ID.  Some systems create this file at installation time.
-	# See 'man machine-id'.
+	# See 'man machine-id' and global/etc.
 	# file - Use the contents of another file (system_id_file) to set
 	# the system ID.
-	# system_id_source = "none"
+	system_id_source = "none"
 
 	# Configuration option global/system_id_file.
 	# The full path to the file containing a system ID.
@@ -939,6 +947,7 @@ global {
 	# This configuration option does not have a default value defined.
 	# system_id_file = ""
 
+	# Configuration option global/use_lvmpolld.
 	# Use lvmpolld to supervise long running LVM commands.
 	# When enabled, control of long running LVM commands is transferred
 	# from the original LVM command to the lvmpolld daemon.  This allows
@@ -1572,7 +1581,6 @@ dmeventd {
 	# bar is given to the hosts named machine1 and machine2.
 	# tags { foo { } bar { host_list = [ "machine1", "machine2" ] } }
 	# This configuration section has variable name.
-	# This configuration section does not have a default value defined.
 	# tag {
 
 		# Configuration option tags/<tag>/host_list.
@@ -1582,6 +1590,6 @@ dmeventd {
 		# matches an entry in this list, the name of the
 		# subsection is applied to the machine as a 'host tag'.
 		# This configuration option does not have a default value defined.
-		# host_list = ""
+		# host_list = [ ]
 	# }
 # }

conf/lvmlocal.conf.in

@@ -36,7 +36,6 @@ local {
 	# Example:
 	# Set the system_id to the string 'host1'.
 	# system_id = "host1"
-	# This configuration option does not have a default value defined.
 	# system_id = ""
 
 	# Configuration option local/extra_system_ids.