update redhat multipathd init script
update redhat multipathd init script

This patch adds the requested force-stop and force-restart to the init
script. It also keeps the init script for printing annoying error messages,
while checking the root device.

vijaychauhan/multipath-tools,unakatsuo/multipath-tools,grzn/multipath-tools-explained,unakatsuo/multipath-tools,grzn/multipath-tools-explained,vijaychauhan/multipath-tools,unakatsuo/multipath-tools