[pbmserv] Broadcast from camb via PBM Server

[pbmserv <pbmserv@gamerz.net>]

Druid Update
~~~~~~~~~~~~

The lintel placement rule has been changed from "same-coloured end stones" 
to "must lie flat and sit directly on top of at least two same-coloured 
stones".

This allows more variety of play, lets players encroach onto enemy stones, 
and will hopefully alleviate the sarsen stacking problem.

This rule has now been implemented. My apologies for any negative impact on 
games in progress; I'm happy to resign and start again if you'd like.

camb