v2.2.17 release candidate released

[Timo Sirainen]

> Michael Grimm <trashcan at odo.in-berlin.de> kirjoitti 9.5.2015 kello 23.17:
> 
> Hi —
> 
> Timo Sirainen <tss at iki.fi> wrote:
> 
>> Please test especially non-Linux systems as there are some larger configure/Makefile changes done since v2.2.16.
> 
> 2.2.17.rc1 will compile on FBSD 10.1 only, if bash has been installed

Dovecot hg requires bash currently, but the rc1 tarball should compile even without bash because the generated files are included in the tarball. Or should at least..