[Dovecot] Unlock non existent locks

[Timo Sirainen]

On Fri, 2013-08-02 at 14:30 +0200, Thomas Hummel wrote:
> Hello Timo,
> 
> I'm running 
> 
>   a single instance of dovecot-2.1.15
>   on a single host running 8.3-RELEASE-p3 FreeBSD amd64
>   mailboxes (Maildir), control files and indexes are on NFS (v3,tcp)
> 
>      mail_nfs_storage = yes
>      lock_method = fcntl
>      [didn't touch the following]
>      # Mail index files also exist in NFS. Setting this to yes requires
>      # mmap_disable=yes and fsync_disable=no.
>      mail_nfs_index = yes

Since you have only one Dovecot accessing the NFS, you don't need either
mail_nfs_storage=yes or mail_nfs_index=yes. My guess is that by setting
those to "no", you'll also solve this:

> 2013-08-02T14:12:29+02:00 <0.5> XXXX-10(id10) /boot/kernel.amd64/kernel: [lkf_delegate.c:2752](pid 46390="kt: dwt3")(tid=101282) dev_local_lkf_unlock(): no lock entry present to unlock for resource: 1:19d5:fdbe ;client: 0xa51cc3f444107