* Added a pagecount plugin, enabled by default.
* Support PreProcessorDirectives with no parameters, ie "[[pagecount ]]".
* Fixed/optimised backlinks code, to avoid rebuilding pages to update
backlinks when the backlinks hadn't really changed.
* Moved inline page support, rss generation etc into the inline plugin,
enabled by default.
* Added brokenlinks plugin, not enabled by default, but rather handy.
* Fix several broken links in the doc wiki.
holger reported that decode_utf8 was crashing with perl 5.8.8. Earlier, I
thought that passing 0 to the function avoided this with old perls, but
that was apparently not enough, it still crashes. So, put it inside the
eval, so we can at least recover from it crashing.
The old code actually did the same thing, just obfuscated -- since the eval
use wasn't quoted, it used the modules on load. Thus, the error (not to
mentioned the return) was bypassed, and it just failed on load.
But that seems like the right thing to do, really, so just made it clearer
that's what happens.