Add ProcessingPeersPattern and ProcessingPeersMinimum parameters. If this is configured, the process will accept all connections from peers matching ProcessingPeersPattern, but will NOT accept connections from other peers until ProcessingPeersMinimum peers of the first type are connected. This allows relays to only go online if there are enough worker peers connected behind them.

The digested changelog can be found under:
 contrib/debian/changelog
 
You can also find the exhaustive list of change using mercurial history, 
or at the following URL: http://www.freediameter.net/hg/freeDiameter/shortlog