fix segfault that could be caused by merging an empty bloom-filter
with a bloom-filter already containing values.

I assume that it is ok to merge an empty bloom-filter with any bloom-filter -
if not we have to change the patch to return an error in this case.
Merge remote-tracking branch 'origin/fastpath'

Slightly adapted after discussing with Bernhard. I also added one
further check.

* origin/fastpath:
  fix segfault that could be caused by merging an empty bloom-filter with a bloom-filter already containing values.
Updating submodule(s).

 [nomail]
Updating submodule(s).

 [nomail]
Small fix to deal with a bug in the SSL log delay mechanism.

 - It looks like we might have some parser problem, but I just want
   to work around this problem for the moment.
Merge branch 'master' into topic/jsiwek/faf-updates
Fix a ref counting bug.

BIT-1049 #request-merge