[ANNOUNCE] igmpproxy 0.3

Hello! I would like to announce a new version of igmpproxy 0.3

https://github.com/pali/igmpproxy/releases/tag/0.3

Changes since previous version:
* Show error message when maximum number of multicast groups were
  exceeded and hint for linux systems how to increase this limit
* Improve downstream host tracking for quickleave mode via hashing table
  with MurmurHash3 hash function and pseudorandom seed
* Fix compilation on FreeBSD
* Use only one mrouter socket also for sending join/leave messages to
  upstream router