config/reader: Refactor parsing of "protocol" setting.

Refactor and cleanup parsing of "protocol" setting in preparation
for reader config conversion.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8133 4b0bc96b-bc66-0410-9d44-ebda105a78c1
config/reader: Refactor parsing of "device" setting.

Preparation for reader config conversion.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8134 4b0bc96b-bc66-0410-9d44-ebda105a78c1