SNDCP: add V.42bis data compression functionality

 - Add compression control for V.42bis Add code to handle compression
   (gprs_sndcp_dcomp.c/h)
 - Add Adjustments in SNDCP
 - Add VTY commands

Change-Id: I6d36cbdf2f5c5f83ca9ba57c70452f02b8582e7e
10 files changed
tree: 760a1631a8f84b2fadaaf3379c077ae2eacc32b6
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap