Took me a few hours to figure out that when I got:
“child exited with status 13 /usr/local/lib/python2.6/site-packages/Trac-0.11.5-py2.6.egg/trac/web/fcgi_frontend.py”
The problem was that I needed to chmod a+x /usr/local/lib/python2.6/site-packages/Trac-0.11.5-py2.6.egg/trac/web/fcgi_frontend.py
a+x might be a bit lenient, but it works now. When I rebuilt my ports the permissions changed to 644, which makes sense. Trac is back in working order now, although my fullblog plugin is acting up. Seems like a simple issue though…