omd: Always use apachectl instead of the init script

When interacting with the system wide apache process it seems
to be more portable to use the apachectl program instead of
the init script. In times of all the different upstart, systemd
and whatever the init scripts are not used on all systems anymore.
nagvis: Updated nightly build
Made system apache actions/test etc. more portable
READHAT distro makefiles are now linked again