[Dovecot] avoid log message when using nagios check

[Timo Sirainen]

On 10.7.2013, at 23.47, Daniel Parthey <d.parthey at metaways.de> wrote:

> You're right, TCP connections don't seem to be a real problem here.
> 
> I confused it with the following messages, we get every few minutes in the dovecot-director.log, but I'm not sure of their origin yet,
> there are some other imap proxies/balancer in front of the director:
> 
> Jul 10 21:51:46 10.129.3.233 dovecot: director: Error: read(login connection) failed: Connection reset by peer
> Jul 10 21:51:49 10.129.3.213 dovecot: director: Error: read(login connection) failed: Connection reset by peer

Those aren't really errors. They should just be ignored. This gets rid of them: http://hg.dovecot.org/dovecot-2.2/rev/ebbe00999da8

I'm not sure why I haven't seen these before though. Was this with Linux? Or I guess more likely it's because you're not using it in high performance mode as explained in http://wiki2.dovecot.org/LoginProcess