property c wraper: terminate string properly
x11rdp: disable debug output per default
icp: connect to pbrpc endpoint in pbrpc thread

fixes #52
rds: improved signal handling

Block all signals per default before forking (signal mask is inherited).
Unblock only required signals.

fixes #56
mod/x11: improved display id detection

* check if unix socket for an display exits
* clean up x11 lock file and unix socket in case x11 wasn't shut down properly

fixes #45
Merge remote-tracking branch 'bmiklautz/master' into Devel
renaming property scope of live connection settings to current.connection.