add hexstr_to_bytestring bif that does exactly the opposite of
bytestring_to_hexstr.
Merge remote-tracking branch 'origin/topic/jsiwek/uid'

* origin/topic/jsiwek/uid:
  Fix UID compiler warning/error & missed baselines.
  Increase UIDs to 96 bits w/ C/F prefix - BIT-1016
Merge remote-tracking branch 'origin/topic/bernhard/hexstr'

BIT-1069 #merged

* origin/topic/bernhard/hexstr:
  add hexstr_to_bytestring bif that does exactly the opposite of bytestring_to_hexstr.
Updating submodule(s).

 [nomail]
Updating submodule(s).

 [nomail]
Added a $unique_max field to Reducers for the SumStats::UNIQUE calculation

 - Using the new option in scan.bro and the FTP bruteforce detection.
Merge branch 'master' of ssh://git.bro-ids.org/bro
UID optimizations addressing BIT-1016.

Max UID bit-length is now 128, but can be increased w/ trivial source
code change of BRO_UID_LEN.