Profiles

Mentioned in [25683] on Core SVN:
Ensure wp::send_headers() detects a comments feed when permalinks are disabled and thus the withcomments QV is omitted.

Mentioned in [24502] on Core SVN:
Use correct backreference in obsolete feed redirection code.

Created ticket #24623 on Core Trac:
Redirection goes wrong with an additional parameter at /?feed=rss

Created ticket #24622 on Core Trac:
If-Modified-Since is wrong by comment feed