Feature 1093: stream engine config options v5

Changes since https://github.com/inliniac/suricata/pull/799:
- add option for StreamMsg
- suppress some info messages by default

PRscript:
- PR build: https://buildbot.suricata-ids.org/builders/inliniac/builds/166
- PR pcaps: https://buildbot.suricata-ids.org/builders/inliniac-pcap/builds/86