Don't automatically route all networking through VPN

As I add configuration that does not require the client to change gateway to the VPN server, I notice that gateway is still being changed.
Not all VPN configurations meant to be handled that way. Some of them are just what they are - virtual network connections just to access machines on the said network.

Launchpad Details: [#LP1658542](https://bugs.launchpad.net/bugs/1658542) Andrew "dr. Equivalent" Scherbackoff - 2017-01-22 23:14:49 +0000

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