config: Exit with zero error code from gui config.

This prevents harmless but annoying message when
saving the config from gui:
   make: *** [config] Error 1

Thanks to Gorgone for the report.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8389 4b0bc96b-bc66-0410-9d44-ebda105a78c1
config: Fix config.c format when openssl is not found in path.

Thanks to Gorgone for the report.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8390 4b0bc96b-bc66-0410-9d44-ebda105a78c1
config: Do not declare config_mak static openssl is not found.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8391 4b0bc96b-bc66-0410-9d44-ebda105a78c1