hooks:commit-msg: Allow links being overly long

Allow links on single lines and in git trailers.

meta/git/hooks/commit-msg

@@ -68,6 +68,11 @@ BKP_IFS="$IFS"
 IFS='
 '
 for line in $body; do
-	[[ ${#line} -le 72 ]] || die "Body lines too long. (<= 72)"
+	[[ ${#line} -gt 72 ]] || continue
+
+	# Allow links on single lines and in trailers
+	[[ ! $line =~ ^([-A-Za-z0-9]*:)?[\ \	]*https?://[^\ ]*$ ]] || continue
+
+	die "Body lines too long. (<= 72)"
 done
 IFS="$BKP_IFS"