[Review] Request from 'schubi2' @ 'yast/yast-http-server/review_140909_initialized_defined_variables'

Please review the following changes:
  * 053df70 packaging
  * 83b35ef checking initialized/defined variables
  * cd0b28a writing NameVritualHost entry in default-server.conf correctly

Yes, it it needed. I have tried. :-)