parse config file case sensitive

(cherry picked from commit 3ef67c8d7421ab841682711f7a6e9ac5462bce7b)

Conflicts:
	VERSION
	package/yast2-slp-server.changes
improved fix for bnc#291301 (write also values that wasn't readed)

(cherry picked from commit 4a1ce4dabbb40c4fa40ad5909b3714aee92f2931)

Conflicts:
	VERSION
	package/yast2-slp-server.changes
Merge pull request #5 from yast/case-sensitive-sle11

parse config file case sensitive (bnc#868231)