[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

It is actually needed as variable in block is not enough to be defined. Try:
```
irb(main):001:0> [].each { b = 1 }
=> []
irb(main):002:0> b
NameError: undefined local variable or method `b' for main:Object
	from (irb):2
	from /usr/bin/irb:12:in `<main>'
```