Update Kills Dovecot

[Timo Sirainen]

> On 05 Jun 2016, at 17:48, Sven Roellig <sven_roellig at yahoo.de> wrote:
> 
> Hi,i  run Dovecot 2.3.0 Alpha
> The last two Updates broken dovecot.in the mail.war log i became the error, on every mail,
> ..........de)<3+RHF1k4VFfDOwAApDKQ5A>: Fatal: master: service(lmtp): child 15299 killed with signal 6 (core dumps disabled)
> Jun  5 16:39:40 director dovecot: lmtp(roellig@*******.org)<1o6JAKw5VFcPPAAApDKQ5A>: Panic: file imem.c: line 60 (i_strconcat): assertion failed: (str1 != NULL)                                                                                             
..
> (duplicate_init+0x5d)

Thanks, fixed: https://github.com/dovecot/core/commit/759871175771fb122620949190ee3b40cc955695

BTW. You should have a home directory set: http://wiki2.dovecot.org/VirtualUsers/Home