ignore SIGHUP in YaST2.Second-Stage to make autoyast installs with serial console succeed again (bnc#825728, bnc#823224)
changelog entry
Merge remote-tracking branch 'upstream/master'

Conflicts:
	package/yast2-installation.changes
Merge pull request #52 from thomas-fehr/master

ignore SIGHUP in YaST2.Second-Stage to avoid broken autoinstall with serial console