gtphub: fix echo reply to SGSNs: wrong fd. Add test.

The actual fix is just one character, but also add a regression test against
this, on both CTRL and USER plane.
2 files changed
tree: c1ce672bdbd1eae598f191da07df07e4ec8dfa87
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. .gitignore