added configurability to control scripts
added log4j config option and systemd support
updated missing case section in ctl scripts
log4j definition
position of -D is relevant ...
Merge remote-tracking branch 'remotes/upstream/0.20' into 020
Merge branch '020' of git://github.com/bmanojlovic/graylog2-server into bmanojlovic-020

Conflicts:
	build_script/copy/bin/graylog2ctl