Time for 2.3.13?

[Thomas Jarosch]

Bron,

I've quickly reviewed your patches and put them in our production server.
Seems to work fine :-)

Maybe the comment of the "cyrus-always-unlink-2.3.12.diff" patch can be 
expanded a bit so I won't be removed in the future again: unlink() is normally 
not needed as fopen(stagefile, "w+") will truncate the file if it exists.
The patch is still good as it will remove files with wrong access permissions.

Cheers,
Thomas