fix dialog window creation

Add a minimal width so dialog windows with input lines have at least the
size of the input line.
fix nfs & cifs mounts (bnc #890172)

We don't do dns lookups in linuxrc any longer. Adjusted code to no longer
rely on resolved addresses but to just use server names as provided by the
user.
s390x: don't resolve name of x11 server
add comment
clarify return code
Merge pull request #24 from openSUSE/sw_0012

Sw 0012