added checks for iptables return status (https://github.com/globaleaks/GlobaLeaks/issues/291)
amendment to previous commit: simplified iptables support checking.
default init.d script variables values moved to /etc/default/globaleaks
added globaleaks.default file used during packaging and setupped as /etc/default/globaleaks
added globaleaks.default file used during packaging and setupped as /etc/default/globaleaks (take two)
Merge remote-tracking branch 'origin/init_script_fixes'

Conflicts:
	debian/globaleaks.init
fixes for travis-ci local package testing