github/github-services — pull request #550 by theill (2013-03-17 19:59:30+00:00)
Title: Adds support for posting to multiple rooms by specifying room ids separated with comma

Both room_id and room_name is supported so a check if needed to avoid breaking backward compatibility with rooms having comma in their name.
Only separate rooms if all are integers (i.e. room ids instead of room names).