This ensures that the same link is reached as is used on pages,
so browsers will know that the link on pages has been visited, and color it
appropriately.
This occurred when a plugin, loaded earlier, filled out a template in its
checkconfig, before recentchanges's checkconfig had run. Since such a
template won't be a recentchanges template, just test for the value being
uninitialized and skip processing.
* 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.
I kept it to a simple global configuration, rather than using the
preprocessor directive for recentchanges, because that had chicken and egg
problems and seemed overcomplicated. This should work reasonably well,
though it would be good to add some more metadata so that more customised
recentchanges pages can be made.
Joey Hess