Merge pull request #319 from saltire/rss

[rss] Report malformed XML; skip updating feed with unchanged etag
Merge branch 'master' of https://github.com/embolalia/willie
Revert "Add trigger.raw and fix issue #310"

This reverts commit b408543071842bf04346fb7f569eaa4d1061cb13.
[coretasks] Attempt to rejoin registered-only channels
forgot to import time
Merge pull request #320 from bui/master

Revert b408543 and fix #310