This works around a perl crasher bug, and also avoids bloating pages
with enormous diffs.
rcs_recentchanges modified to return a list in an array context.
* rcs_diff is a new function that rcs modules should implement.
* Implemented rcs_diff for git, svn, and tla (tla version untested).
Mercurial and monotone still todo.
* Add a test suite for the svn backend.
* Daemonize before sending RPC pings, since that can take a while
and/or hang.
* Daemonize before sending commit mails, as that can also take a long
time/hang if the mail server is unhappy.
* Factor out commit mail sending code into new function.
* Web commits by OpenID users will record the full OpenID url for the user,
but in recentchanges, these urls will be converted to a simplified display
form+link.
* Modified svn, git, tla backends to recognise such web commits.