PPPoE Server Scripts 0.4 Release

PPPoE Server Scripts for systemd architecture to start/stop daemons.

Change 0.4 over 0.3:

• Fix the service to correctly start at boot.

Change 0.3 over 0.2:

• Changing lock system from lockfile to flock to be more portable
  between systems and to not depend on procmail.

Change 0.2 over 0.1:

• Changed the script to start the daemon after building the parameters
• Renamed the script to pppoe-server-start
• Updated the service
• Adding lock file to prevent paralel execution to get same session ID

First release 0.1.