We've seen several reports now of 7.2 postmasters failing to start
because of weird networking setups --- if it's impossible to create
a loopback UDP port on 127.0.0.1, 7.2 will exit with
PGSTAT: bind(2): Cannot assign requested address
It occurs to me that a more friendly behavior would be to disable
statistics gathering and proceed with startup anyway. Any objections?
regards, tom lane