* doc/search.xml, doc/search.templ, doc/Makefile.am,
  doc/search.php.inc: Added new facility to "autogen"
  the search script.  Fixed a few more problems with
  the API page generation.
* doc/site.xsl, doc/api.xsl, doc/newapi.xsl: integrated
  the autogeneration of the php script.  Note that from
  this point doc/search.php will be include in the
  generic "Rebuilt docs".
* doc/*: api docs rebuilt.