support round-robin in fm partition if no field/regex is specified (instead of defaulting to first field)
ignore errors trying to cleanup temp dir
give cowdir a default that does not cause errors
fixes for python 2.6
deal with NFS staale filehandle resulting form race to unlock by multiple nodes
some hosts only have a good domainname when you connect to the mail relay
compress the pickled config (speeds things up when it gets big so we have fewer blocking writes in the event loop)