Bug 1499590 - Thunderbird fixes in periodic_file_updates.sh. r=sfraser

Updates to periodic_file_updates.sh to complete Thunderbird support

- added comm- branch support so that repository URL's are correctly determined
- set COMMIT_AUTHOR appropriately for Thunderbird

Differential Revision: https://phabricator.services.mozilla.com/D9259

--HG--
extra : moz-landing-system : lando

taskcluster/docker/periodic-updates/scripts/periodic_file_updates.sh

@@ -496,6 +496,7 @@ case "${PRODUCT}" in
     APP_DIR="mail"
     APP_ID="%7B3550f703-e582-4d05-9a08-453d09bdfdc6%7D"
     APP_NAME="Thunderbird"
+    COMMIT_AUTHOR="tbirdbld <tbirdbld@thunderbird.net>"
     ;;
   firefox)
     APP_DIR="browser"
@@ -513,13 +514,18 @@ if [ "${REPODIR}" == "" ]; then
   REPODIR="$(basename "${BRANCH}")"
 fi
 
-if [ "${BRANCH}" == "mozilla-central" ]; then
+case "${BRANCH}" in
+  mozilla-central|comm-central )
     HGREPO="https://${HGHOST}/${BRANCH}"
-elif [[ "${BRANCH}" == mozilla-* ]]; then
+    ;;
+  mozilla-*|comm-* )
     HGREPO="https://${HGHOST}/releases/${BRANCH}"
-else
+    ;;
+  * )
     HGREPO="https://${HGHOST}/projects/${BRANCH}"
-fi
+    ;;
+esac
+
 MCREPO="https://${HGHOST}/mozilla-central"
 
 # Remove once 52esr is off support