Update documentation CAP_NET_ADMIN -> CAP_NET_RAW.
Remove useless capabilities CAP_SETUID CAP_SETGID in service unit files.
There are only useful if not using either User=sslh nor DynamicUser=true
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.