gbproxy: Add quirk commands to allow upgrade from pre-release

The pre-release didn't add a newline after the apn and the patching
pattern command. Create a quirk command that combines both. The
pre-release didn't include a differentation between routing and
patching.

The TLLI handling has a different and more generic name now. Make
it handle the old one that is actively used.

Add a file with the broken format and the standard config file
test should pick it up.
diff --git a/openbsc/osmoappdesc.py b/openbsc/osmoappdesc.py
index 9d6fbe6..ddda6ab 100644
--- a/openbsc/osmoappdesc.py
+++ b/openbsc/osmoappdesc.py
@@ -31,7 +31,8 @@
     "osmo-bsc": ["doc/examples/osmo-bsc/osmo-bsc.cfg"],
     "nat": ["doc/examples/osmo-bsc_nat/osmo-bsc_nat.cfg"],
     "mgcp": ["doc/examples/osmo-bsc_mgcp/mgcp.cfg"],
-    "gbproxy": ["doc/examples/osmo-gbproxy/osmo-gbproxy.cfg"],
+    "gbproxy": ["doc/examples/osmo-gbproxy/osmo-gbproxy.cfg",
+             "doc/examples/osmo-gbproxy/osmo-gbproxy-legacy.cfg"],
     "sgsn": ["doc/examples/osmo-sgsn/osmo-sgsn.cfg"],
     "nitb": ["doc/examples/osmo-nitb/nanobts/openbsc-multitrx.cfg",
              "doc/examples/osmo-nitb/nanobts/openbsc.cfg"]