=== Split osmo-gbproxy from osmo-sgsn ===

Adjust the build system, packaging etc. to split osmo-gbproxy into its
own git repository. Remove tests and configs that aren't related to
osmo-gbproxy.

Related: OS#4992
diff --git a/configure.ac b/configure.ac
index f1a4ed4..0a0897a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script
-AC_INIT([osmo-sgsn],
+AC_INIT([osmo-gbproxy],
 	m4_esyscmd([./git-version-gen .tarball-version]),
 	[osmocom-net-gprs@lists.osmocom.org])
 
@@ -51,29 +51,10 @@
 
 
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.4.0)
+PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.4.0)
 PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.4.0)
 PKG_CHECK_MODULES(LIBOSMOCTRL, libosmoctrl >= 1.4.0)
-PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.4.0)
 PKG_CHECK_MODULES(LIBOSMOGB, libosmogb >= 1.4.0)
-PKG_CHECK_MODULES(LIBOSMOABIS, libosmoabis >= 0.6.0)
-PKG_CHECK_MODULES(LIBOSMONETIF, libosmo-netif >= 0.4.0)
-PKG_CHECK_MODULES(LIBOSMOGSUPCLIENT, libosmo-gsup-client >= 1.0.0)
-
-# Enable/disable 3G aka IuPS + IuCS support?
-AC_ARG_ENABLE([iu], [AS_HELP_STRING([--enable-iu], [Build 3G support, aka IuPS and IuCS interfaces])],
-    [osmo_ac_iu="$enableval"],[osmo_ac_iu="no"])
-if test "x$osmo_ac_iu" = "xyes" ; then
-    PKG_CHECK_MODULES(LIBOSMOSIGTRAN, libosmo-sigtran >= 1.0.0)
-    PKG_CHECK_MODULES(LIBASN1C, libasn1c >= 0.9.30)
-    PKG_CHECK_MODULES(LIBOSMORANAP, libosmo-ranap >= 0.6.0)
-    AC_DEFINE(BUILD_IU, 1, [Define if we want to build IuPS and IuCS interfaces support])
-fi
-AM_CONDITIONAL(BUILD_IU, test "x$osmo_ac_iu" = "xyes")
-AC_SUBST(osmo_ac_iu)
-
-
-PKG_CHECK_MODULES(LIBGTP, libgtp >= 1.5.0)
-PKG_CHECK_MODULES(LIBCARES, libcares)
 
 dnl checks for header files
 AC_HEADER_STDC
@@ -257,23 +238,11 @@
     include/osmocom/Makefile
     include/osmocom/sgsn/Makefile
     src/Makefile
-    src/gprs/Makefile
-    src/sgsn/Makefile
-    src/gbproxy/Makefile
-    src/gtphub/Makefile
     tests/Makefile
-    tests/atlocal
-    tests/gprs/Makefile
-    tests/sgsn/Makefile
-    tests/gtphub/Makefile
-    tests/xid/Makefile
-    tests/sndcp_xid/Makefile
-    tests/slhc/Makefile
-    tests/v42bis/Makefile
     doc/Makefile
     doc/examples/Makefile
     doc/manuals/Makefile
     contrib/Makefile
     contrib/systemd/Makefile
-    contrib/osmo-sgsn.spec
+    contrib/osmo-gbproxy.spec
     Makefile)