Description of problem:
DEVICETYPE should be set to ppp when TYPE is xDSL in
network-functions. Without that, DEVICE needs to be a string starting
with ppp to be recognized as a ppp device. Note that it doesn't make
much sense to have the DEVICE set to ppp0 (for example). If many ppp
devices are defined, ppp0 will be the first one started regardless of
what DEVICE is set too. AFAICT the only other use of that field is in
ip-up (or more precisely ip-up.local) scripts. In such case I would
like to use something other than ppp to distinguish between the
different types of connections (internet, tunnel, etc...) I define.
The change is quite trivial, but I'm attaching a diff just to clarify
what I mean.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Create a new xDSL
2. Set DEVICE to internet (for example)
3. ifup internet
  
Actual results:
The ppp connection is not started.


Expected results:
pppd started

Additional info: