- Refactorization of option file generation
- Introduction of optional additional pppd options file specification
- Introduction of unit specification option for pppoe connections

Robbie Smith authored Apr 16, 2013 and Jouke Witteveen committed Apr 16, 2013

Removed unnecessary options from example connection.

Also:
- Replaced echos with invocations of cat, where possible.
- Fixed PIDFILE to point to the file ppp creates. This ensures the
  interface can be brought down.
- Fixed setting of InterfaceRoot.
- Removed vim syntax highlighting from ethernet connection.