FYI: merge of gtphub

Hi list, I'm merging the last commits from the neels/gtphub branch to master (Holger agrees). I will direct my attention to other topics for the time being -- we're waiting for a live testing setup. ATM, I would see gtphub's maturity as "alpha": I believe it works as intended, but all testing so far, even though done with real equipment, was in a controlled test environment. If anyone would like to give it a spin, we'd appreciate any feedback. ~Neels -- - Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschäftsführer / Managing Directors: Holger Freyther, Harald Welte