Bug 1423487 - rss feed does not display several authors - SM part. r=frg

suite/locales/en-US/chrome/mailnews/messenger.properties

@@ -251,6 +251,11 @@ hasAttachments=Has Attachments
 # for the Tag picker in search and mail views.
 tag=Tag
 
+# LOCALIZATION NOTE(andOthers):
+# for multiple authors, add this abbreviation to the first author to indicate
+# there are more; for the From column in the threadpane message list.
+andOthers=et al.
+
 # mailnews.js
 mailnews.send_default_charset=UTF-8
 mailnews.view_default_charset=ISO-8859-1