* gbproxy: Test case for BVC flow control procedure
* gbproxy: properly shutdown at the end of the test
* gbproxy: Introduce global guard timer in test_CT
* gbproxy: Rename PCU port to PCU_PTP; SGSN port to SGSN_PTP
* gbproxy: cosmetic: More comments / section headers
* bssgp: Introduce "GLOBAL" port for PTP BVC
* bssgp: rename tr_GLOBAL to tr_GLOBAL_SIG
* deps: Switch to osmocom fork of titan.ProtocolEmulations.SCCP
* SCCP_Tests.default: Use "SccpDemoUser" as VTY prompt
* WIP: gen_links.sh + regen_makefile.sh for make SCCP_Tests