Changes

fixup for SCCP_MAX_OPTIONAL_DATA changing to 128

Change-Id: I2fdafa88be1f25c90c7e1a34423a25aa7f5bff5c

s1gw: track eNB connection, fail immediately on loss

Change-Id: I34a3d30270f1236908643b60fc8abe590a780b89

s1gw: implement the REST interface client

OsmoS1GW implements a custom (non-standard) REST interface, primarily
intended for state introspection.  The interface is specified using
OpenAPI, with the specification available in osmo-s1gw.git.

Change-Id: Ic6e8b46b7de4fb72139b017fc9a9c83f92fc1541
Related: SYS#7066

ttcn3-tcpdump-start: fix default TTCN3_PCAP_PATH

Fix that manually running testsuites (as described in README.md) would
unsucessfully attempt to start dumpcap for 10s before running each test:

  NOTE: unable to use dumpcap due to missing permissions in /tmp
  Warning: Named pipe already exists: /tmp/cmderr
  sudo -n /usr/bin/tcpdump -U -s 1520 -n -i any -w "/tmp/smdpp_Tests.TC_rsp_complete_flow.pcap" >/tmp/smdpp_Tests.TC_rsp_complete_flow.pcap.stdout 2>/tmp/cmderr &
  Waiting for packet dumper to start... 0
  Waiting for packet dumper to start... 1
  Waiting for packet dumper to start... 2
  Waiting for packet dumper to start... 3
  Waiting for packet dumper to start... 4
  Waiting for packet dumper to start... 5
  Waiting for packet dumper to start... 6
  Waiting for packet dumper to start... 7
  Waiting for packet dumper to start... 8
  Waiting for packet dumper to start... 9
  Packet dumper didn't start filling pcap file after 10 seconds!!!

This happens because /tmp is owned by root and not by the user running
ttcn3-tcpdump-start. Put the pcaps in /tmp/pcap by default instead of
/tmp and create this directory as the current user if it does not exist.
This also prevents cluttering /tmp.

Note that this is only relevant when manually running the testsuites and
not setting TTCN3_PCAP_PATH, e.g. testenv sets this variable already.

Change-Id: I1eb80d7f9e8dd491387e4d1da9b4ac6ac5cb7dc5

testenv: add a --fast argument

The ttcn3-{tcpdump,dumpcap}-*.sh scripts can easily spend 5s or more for
each test with:
* Waiting until the pcap gets created.
* Waiting until pcap size does not increase anymore after the test.
* Saving the talloc report.

Add --fast to skip all this, to allow running a whole testsuite
significantly faster locally to check for regressions. Developers can
then still run failing tests again without --fast to get the pcap and
talloc reports.

Change-Id: Ief3488293e5c5c1a1c98244f80ffd56eadb040c5

Makefile: ctags: include *.cc/*.hh files

Also generate tags for *.cc/*.hh files.  In order to avoid generating
tags for generated source files, limit the search scope for `find`.

Change-Id: Iab28b36ea6bb6ece45d1834dfc04be489da39ea2