Enhanced VNC module UI.
Write securitytypes=none into xinet.d/vnc. bnc#808490

When Remote administration is enabled Xvnc authentization is
disabled - let xdm takes care of it.
Created testsuite for remote administration.
Updated changelog.
Use correct service name for Xvnc server. bnc#808490

Remote Administration module is capable to open port in firewall.
Updated changelog
Merge pull request #97 from mchf/master

Set correct securitytype when enabling Remote administration.