Initial LVS support.

Currently supports a subset of possible configurations, listed in the docs.
Add missing newline after persistence_timeout.

And test for newlines in the relevant places, since keepalived requires it.
Permit the port to be ommitted for real servers.

If the port on the real servers matches the VIP port, allow it to be omitted
from real server definitions.
Merge pull request #10 from songkick/lvs-support

LVS support, an initial cut