creates configuration in pglb.conf that can prevent the load balancer from 
checking to see if it can connect to the local PostgreSQL server via it's 
unix domain socket.

If you can't think of any reasons why this could be useful for you, then you 
probably don't need it :-)

This patch may not apply nicely if the IP_Addr patch is not applied.
The code, however, does not depend on the IP_Addr code.

This is done against 1.5.0rc7
