Here are the custom code and patches for the Xapian-powered Gmane Search.
#define BLOWFISH_KEY "A secret passphrase goes here"This key is used for decrypting encrypted addresses and obviously I'm not going to reveal the key which gmane actually uses...
There are some small patches we use. A few of these really are gmane-specific. Others would be useful in other applciations, but need cleaning up or generalising before they can be included in official Xapian releases.