The improvements include:
* HTMLPurifier cache is stored in localcachedir
* allowobjectembed changes are not ignored any more
* the cache keys include revision and all options which makes
this suitable for local caches on cluster nodes
* unchanged test is replaced by "true" value which should
significantly improve performance
* removal of purge_all_caches() hack for directory recreation
* comments and coding style cleanup
Better performance, more reliable, completely self contained,
more validation and full backwards compatibility.
This will also allow us to implement ignoring of plugins.
Nasty strings includes html entities and
non-breaking spaces followed by spaces which makes
very hard to find these strings in the DOM html,
this patch keeps the non-breaking spaces and all
the nasty characters, but leaves them isolated from
other regular spaces. It swaps the strings to HTML before
finding elements in the HTML that matches that contents.
David Monllao