Merge pull request #163 from marttipiirainen/next

Merge Call Barring support, SIM ATK support and SMS ACK bugfix from 'next' to 'master'
Ensure that AP list has one INTERNET and one MMS access point

Also, minimized differences with upstream version of provision.c
Merge pull request #164 from jkangas/next

Ensure that AP list has one INTERNET and one MMS access point