Log Message:
Update net/siproxd to v0.8.3

From upstream's release notes:

Major changes since 0.8.2:
 - mostly bugfixes and performance improvements

 New plugins:
 - plugin_stats: write some statistics about currently active calls
 - plugin_blacklist: new plugin to block UACs that cause excessive
   failures during REGISTER attempts

Upgrade Notes 0.8.2 to 0.8.3:
 - Merge the configuration file