Description of Problem:

Both neat and internet-druid do not set a PPP interface to be the default
route by default.  This makes dialing out when you already have a default
gateway a futile exercise, since the machine can't go anywhere on the
dial-up connection (no route).  It also has no effect on a machine without
an existing default route, so it is a much better default.

How Reproducible:

Always

Steps to Reproduce:
1. Use internet-druid or neat to set up a dial-up interface.  Note that
"set this interface to be the default route" is in the Advanced options,
and is not selected by default.
2. Attempt to use this connection to dial out on a machine with an existing
default gateway.
3. 

Actual Results:

No traffic possible on dial-up interface, name resolution and network
traffic go undetermined (sometimes works, sometimes doesn't).

Expected Results:

Dial-up interface should be set to the default route while active by
default, to allow a network-connected PC to dial out to access a specific
remote network.  A dial-up connection should not remove the entries in
/etc/resolv.conf from a pre-existing connection by default. That assumes
that the local (network, not dial-up) DNS server has access to the
internet, so this should be a toggleable choice (it is, PEERDNS) which
defaults to Yes (for the majority who are dialing out normally).

Additional Information: