[Dovecot] Small typo

[Abhijit Hoskeri]

Hi, 

There is a small typo in src/lib/network.c line 624

  return "A non-recovable name server error occurred";

should be 
    
  return "A non-recoverable name server error occurred";

Sorry about the pedantry. BTW, I am getting this error whenever I am
trying to resolve a name from inside dovecot, but I can using the system
tools. I am trying to get the proxying code to use hostnames as well as
IP addresses.

-Abhijit.