[RFC] stanger/cinterion branch

[Aleksander Morgado]

Hey Dan, Matthew and others,

I've pushed a couple of additional commits to the stanger/cinterion
branch; main changes w.r.t to the last branch suggestion are:

 * Avoid the predefined CIDs (and therefore use the generic CID
selection mechanism).
 * Fix connection setup when auth settings required.
 * Implemented connection status monitoring with AT^SWWAN?

I've tested this myself with a PLS8-8 REVISION 03.017 and connection works here.

Dan, how about merging this to master?
Matthew, can you do your own tests with the branch?

-- 
Aleksander
https://aleksander.es