[Dovecot] auth-master socket creation problem?

[Marc Perkel]

I tried activating this code in the example config file and it failed to 
create the socket. You might want to look inti this. Running alpha1.

#auth external {
#  socket connect {
#    master {
#      path = /var/run/dovecot/auth-master
#    }
#  }
#}