tigefa4u projects Trac

WSGI branch: sync with [source:trunk@...].

WSGI branch: fix CGI error message, some minor cleanup.

Improve SMTP header format in ticket notification (long ticket summaries led to display issues w/ some MUAs):
* max header length can be configured
* email library Headers are always used to encode MIME headers
* new notification test
* ''anonymous'' user is always removed from the recipient list

WSGI branch: Revert accidential change that slipped into [2952].

WSGI branch: sync with [source:trunk@...].

WSGI branch: some cleanup, a fix for adding attachments with no file, and automatic url-decoding of the `PATH_INFO` variable under tracd.

WSGI branch: when the `TRAC_ENV` variable was setting when running tracd, only a single project would get served under the root URL.

Fix bad usage of the ticket API in contrib script `emailfilter`. Closes #2255.

WSGI branch: some fixes for [wiki:TracStandalone tracd] and multiple environment handling.

sort report rows using the "sorted" method to make it handle any sequence, not just lists (fixes #2830)