IMAP hibernate feature committed

[Thomas Leuxner]

* Thomas Leuxner <tlx at leuxner.net> 2015.08.25 09:45:

> > http://hg.dovecot.org/dovecot-2.2/rev/64c73e6bd397
> 
> ==> /var/log/dovecot/dovecot.log <==
> Aug 25 09:42:07 nihlus dovecot: imap(tlx at leuxner.net): Error: net_connect_unix(/var/run/dovecot/imap-hibernate) failed: Permission denied
> Aug 25 09:42:07 nihlus dovecot: imap(tlx at leuxner.net): Error: Couldn't hibernate imap client: Couldn't export state: Virtual mailboxes have no GUIDs
> Aug 25 09:42:07 nihlus dovecot: imap(tlx at leuxner.net): Error: net_connect_unix(/var/run/dovecot/imap-hibernate) failed: Permission denied

'chmod 666' mitigates the permission issue on the socket. However it seems to have other issues then:

==> /var/log/dovecot/dovecot.log <==
Aug 25 09:56:49 nihlus dovecot: imap-hibernate: Error: Failed to parse client input: Invalid peer_ip value:
Aug 25 09:56:49 nihlus dovecot: imap(tlx at leuxner.net): Error: /var/run/dovecot/imap-hibernate returned failure: Failed to parse client input: Invalid peer_ip value:
Aug 25 09:56:49 nihlus dovecot: imap: Error:
Aug 25 09:56:49 nihlus dovecot: imap-hibernate: Error: Failed to parse client input: Invalid peer_ip value:
Aug 25 09:56:49 nihlus dovecot: imap(tlx at leuxner.net): Error: /var/run/dovecot/imap-hibernate returned failure: Failed to parse client input: Invalid peer_ip value:
Aug 25 09:56:49 nihlus dovecot: imap: Error:
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