Revert "bugs-in-changelog.sh: Various fixes to cope with new changelog format"

I fixed this in a better way in virt-v2v, so revert this change and
(next commit) use the virt-v2v commit instead.

This reverts commit ae8ff236ab.

bugs-in-changelog.sh

@@ -1,6 +1,6 @@
 #!/bin/bash -
 # bugs-in-changelog.sh
-# Copyright (C) 2009-2021 Red Hat Inc.
+# Copyright (C) 2009-2020 Red Hat Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -21,26 +21,27 @@
 # stable release (or any release).  To use it, the only parameter
 # should be the git commit range, eg:
 #
-#   ./bugs-in-changelog.sh "v1.44.0.."
+#   ./bugs-in-changelog.sh "1.0.89.."
 
 if [ -z "$1" ]; then
     echo "$0 git-commit-range"
     exit 1
 fi
 
-# Grep the log for Bugzilla IDs in various formats.
-rhbzs="$( git log "$1" | egrep -o 'RHBZ#[0-9]+' | sed 's/RHBZ#//' )"
-bzurls="$( git log "$1" | egrep -o 'https?://bugzilla.redhat[_./?=a-z0-9]*[/=][0-9]+\b' | sed 's/.*[/=]\([0-9]\+\)$/\1/' )"
-
-# Uniq and format as comma-separated list of ids.
-bugids=$( for b in $rhbzs $bzurls ; do echo $b; done | sort -u | tr '\n' ',' | sed 's/,$//' )
+# Comma-separated list of Bugzilla IDs.
+bugids=$(
+    git log "$1" | egrep -o 'RHBZ#[0-9]+' |
+    sed 's/RHBZ#//' |
+    sort -u |
+    tr '\n' ',' |
+    sed 's/,$//'
+)
 
 #echo bugids "$bugids"
 
 # Filter out any bugs which may still be in NEW or ASSIGNED:
 bugzilla query -b "$bugids" \
     -s MODIFIED,POST,ON_QA,PASSES_QA,VERIFIED,RELEASE_PENDING,CLOSED \
-    --component libguestfs \
     --outputformat='%{bug_id} %{short_desc}' |
     sort -n -r |
     perl -pe '