MINOR: init: Review RH/CentOS init script

This is an update of the init scripts originally written by Andre
Krajnik. It is quite similar to other init scripts brought by common
packages in RH/CentOS. This commit also introduces a pretty straight
forward sysconfig file.
Merge pull request #4 from julthomas/jth/rhel-init

MINOR: init: Review RH/CentOS init script