Manual pages: order ENVIRONMENT / FILES / CONFORMING TO consistently

There is value in ensuring that manual page sections use consistently
named sections, as far as possible, and also that sections have a
consistent order within manual pages. This is one of a series of patches
to place manual page sections in a consistent order.

In this patch, we ensure that the ENVIRONMENT, FILES, and CONFORMING TO
sections are always placed toward the end of the page, just above NOTES.

One page is not fixed by this patch: term-utils/agetty.8. This page
is a mess of unusual section names, and probably requires an individual
edit.

Testing that no gross editing mistake (causing accidental loss or addition
of text) was performed as follows:

    $ cat $(grep '\.SH' -l $(find . -name '*.[1-9]') |sort) | sort > a
    [Apply patch]
    $ cat $(grep '\.SH' -l $(find . -name '*.[1-9]') |sort) | sort > b
    $ diff a b
    $ echo $?
    0

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

disk-utils/fsck.8

@@ -343,8 +343,6 @@ You're almost certainly doing something that you shouldn't be doing
 with
 .BR fsck .
 Options to different filesystem-specific fsck's are not standardized.
-.SH FILES
-.I /etc/fstab
 .SH ENVIRONMENT
 The
 .B fsck
@@ -388,6 +386,8 @@ enables libblkid debug output.
 .TP
 .B LIBMOUNT_DEBUG=all
 enables libmount debug output.
+.SH FILES
+.I /etc/fstab
 .SH AUTHORS
 .nf
 Theodore Ts'o <tytso@mit.edu>

lib/terminal-colors.d.5

@@ -145,6 +145,10 @@ Lines where the first non-blank character is a # (hash) are ignored.
 Any other use of the hash character is not interpreted as introducing
 a comment.
 
+.SH ENVIRONMENT
+.IP TERMINAL_COLORS_DEBUG=all
+enables debug output.
+
 .SH FILES
 .I $XDG_CONFIG_HOME/terminal-colors.d
 .br
@@ -152,10 +156,6 @@ a comment.
 .br
 .I /etc/terminal-colors.d
 
-.SH ENVIRONMENT
-.IP TERMINAL_COLORS_DEBUG=all
-enables debug output.
-
 .SH EXAMPLE
 Disable colors for all compatible utilities:
 .RS

sys-utils/losetup.8

@@ -178,6 +178,10 @@ displays the status of a loop device, it returns 1 if the device
 is not configured and 2 if an error occurred which prevented
 determining the status of the device.
 
+.SH ENVIRONMENT
+.IP LOOPDEV_DEBUG=all
+enables debug output.
+
 .SH FILES
 .TP
 .I /dev/loop[0..N]
@@ -185,10 +189,6 @@ loop block devices
 .TP
 .I /dev/loop-control
 loop control device
-
-.SH ENVIRONMENT
-.IP LOOPDEV_DEBUG=all
-enables debug output.
 .SH EXAMPLE
 The following commands can be used as an example of using the loop device.
 .nf

sys-utils/mount.8

@@ -2574,6 +2574,17 @@ and
 to the mount.<suffix> helpers.  All other options are used in a
 comma-separated list as argument to the \fB\-o\fR option.
 
+.SH ENVIRONMENT
+.IP LIBMOUNT_FSTAB=<path>
+overrides the default location of the fstab file (ignored for suid)
+.IP LIBMOUNT_MTAB=<path>
+overrides the default location of the mtab file (ignored for suid)
+.IP LIBMOUNT_DEBUG=all
+enables libmount debug output
+.IP LIBBLKID_DEBUG=all
+enables libblkid debug output
+.IP LOOPDEV_DEBUG=all
+enables loop device setup debug output
 .SH FILES
 See also "\fBThe files /etc/fstab, /etc/mtab and /proc/mounts\fR" section above.
 .TP 18n
@@ -2594,17 +2605,6 @@ temporary file (unused on systems with mtab symlink)
 .TP
 .I /etc/filesystems
 a list of filesystem types to try
-.SH ENVIRONMENT
-.IP LIBMOUNT_FSTAB=<path>
-overrides the default location of the fstab file (ignored for suid)
-.IP LIBMOUNT_MTAB=<path>
-overrides the default location of the mtab file (ignored for suid)
-.IP LIBMOUNT_DEBUG=all
-enables libmount debug output
-.IP LIBBLKID_DEBUG=all
-enables libblkid debug output
-.IP LOOPDEV_DEBUG=all
-enables loop device setup debug output
 .SH HISTORY
 A
 .B mount

sys-utils/umount.8

@@ -253,6 +253,13 @@ to the \fB/sbin/umount.\fItype\fR helper independently of UID.
 .PP
 Note that \fI/etc/mtab\fR is currently deprecated and helper= and another
 userspace mount options are maintained by libmount.
+.SH ENVIRONMENT
+.IP LIBMOUNT_FSTAB=<path>
+overrides the default location of the fstab file (ignored for suid)
+.IP LIBMOUNT_MTAB=<path>
+overrides the default location of the mtab file (ignored for suid)
+.IP LIBMOUNT_DEBUG=all
+enables libmount debug output
 .SH FILES
 .TP
 .I /etc/mtab
@@ -264,13 +271,6 @@ table of known filesystems
 .TP
 .I /proc/self/mountinfo
 table of mounted filesystems generated by kernel.
-.SH ENVIRONMENT
-.IP LIBMOUNT_FSTAB=<path>
-overrides the default location of the fstab file (ignored for suid)
-.IP LIBMOUNT_MTAB=<path>
-overrides the default location of the mtab file (ignored for suid)
-.IP LIBMOUNT_DEBUG=all
-enables libmount debug output
 .SH HISTORY
 A
 .B umount