* Added a 'FEEDS.CDN_PURGE_PLUGIN_PATH' field to the database.
* Incremented the database version to 369.
* Added ' RDFeed::cdnPurgePluginPath()' and
'RDFeed::setCdnPurgePluginPath()' methods.
* Removed the RD_MODULES_DIR #define from 'lib/rd.h'.
* Changed the RD_PYPAD_SCRIPT_DIR #define in 'lib/rd.h' to be
a static value of "/usr/lib/rivendell/pypad".
* Added a 'CDN Purge Plug-In' control to the 'Feed' dialog in
rdadmin(1).
Signed-off-by: Fred Gleason <fredg@paravelsystems.com>