tools: Migrate gen-bugnote to GitLab.

Update gen-bugnote to fetch issue titles from GitLab's issue API.

tools/gen-bugnote

@@ -1,26 +1,17 @@
 #!/bin/bash
 #
-# Given a Wireshark bug ID, fetch its title and prepare an entry suitable
-# for pasting into the release notes. Requires curl, grep, and sed.
+# Given a Wireshark issue ID, fetch its title and prepare an entry suitable
+# for pasting into the release notes. Requires curl and jq.
 #
-# Usage: gen-bugnote <bug number>
+# Usage: gen-bugnote <issue number>
 #
 # Copyright 2013 Gerald Combs
 #
 # SPDX-License-Identifier: GPL-2.0-or-later
 #
 
-bz_url_pfx="https://bugs.wireshark.org/bugzilla/show_bug.cgi"
-bug_id="$1"
-
-# Bugzilla gives us UTF-8 with HTML escapes. We want UTF-8. Recode assumes
-# that HTML is encoded as ISO-8859-1.
-# https://github.com/rrthomas/Recode/issues/1
-recode_to_html_cmd="cat"
-if hash recode > /dev/null 2>&1 ; then
-    recode_to_html_cmd="recode utf8..html"
-    recode_to_utf8_cmd="recode html..utf8"
-fi
+gitlab_issue_url_pfx="https://gitlab.com/api/v4/projects/wireshark%2Fwireshark/issues"
+issue_id="$1"
 
 case "$OSTYPE" in
     darwin*)
@@ -38,25 +29,17 @@ case "$OSTYPE" in
         ;;
 esac
 
-if [ -z "$bug_id" ] ; then
-    echo "Usage: $( basename "$0" ) <bug id>"
+if [ -z "$issue_id" ] ; then
+    echo "Usage: $( basename "$0" ) <issue id>"
     exit 1
 fi
 
-bug_title=$(
-    curl -s -o - "${bz_url_pfx}?id=$bug_id" \
-    | grep -i '<title>' \
-    | sed \
-        -e 's/{/\\{/g' \
-        -e 's:.*<title>.*ndash; ::' \
-        -e 's:</title>.*::g' \
-        -e 's/[^\.]$/&./g' \
-        -e 's/\\/{backslash}/g' \
+issue_title=$(
+    curl -s -o - "${gitlab_issue_url_pfx}/$issue_id" \
+    | jq --raw-output '.title'
     )
 
-echo -e "* $bug_title wsbuglink:${bug_id}[].\\n" \
-        | $recode_to_html_cmd \
-        | $recode_to_utf8_cmd \
-        | $clipboard_cmd
+echo -e "* $issue_title wsbuglink:${issue_id}[].\\n" \
+    | $clipboard_cmd
 
-echo "Copied $bug_id: $bug_title"
+echo "Copied $issue_id: $issue_title"