split libgb into a separate library for outside use

This also removes the dependency to osmo_sock() inside libcommon and
replaces it with osmo_sock_* from libosmocore
diff --git a/openbsc/src/gprs/gb_proxy.c b/openbsc/src/gprs/gb_proxy.c
index 1261ccc..afe793d 100644
--- a/openbsc/src/gprs/gb_proxy.c
+++ b/openbsc/src/gprs/gb_proxy.c
@@ -32,10 +32,11 @@
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/select.h>
 
+#include <osmocom/gprs/gprs_ns.h>
+#include <osmocom/gprs/gprs_bssgp.h>
+
 #include <openbsc/signal.h>
 #include <openbsc/debug.h>
-#include <openbsc/gprs_ns.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/gb_proxy.h>
 
 struct gbprox_peer {
diff --git a/openbsc/src/gprs/gb_proxy_main.c b/openbsc/src/gprs/gb_proxy_main.c
index 0bfc6cf..5791dab 100644
--- a/openbsc/src/gprs/gb_proxy_main.c
+++ b/openbsc/src/gprs/gb_proxy_main.c
@@ -37,10 +37,11 @@
 #include <osmocom/core/select.h>
 #include <osmocom/core/rate_ctr.h>
 
+#include <osmocom/gprs/gprs_ns.h>
+#include <osmocom/gprs/gprs_bssgp.h>
+
 #include <openbsc/signal.h>
 #include <openbsc/debug.h>
-#include <openbsc/gprs_ns.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/vty.h>
 #include <openbsc/gb_proxy.h>
 
diff --git a/openbsc/src/gprs/gb_proxy_vty.c b/openbsc/src/gprs/gb_proxy_vty.c
index 09395ed..574f45f 100644
--- a/openbsc/src/gprs/gb_proxy_vty.c
+++ b/openbsc/src/gprs/gb_proxy_vty.c
@@ -24,9 +24,10 @@
 
 #include <osmocom/core/talloc.h>
 
+#include <osmocom/gprs/gprs_ns.h>
+
 #include <openbsc/debug.h>
 #include <openbsc/gb_proxy.h>
-#include <openbsc/gprs_ns.h>
 #include <openbsc/vty.h>
 
 #include <osmocom/vty/command.h>
diff --git a/openbsc/src/gprs/gprs_gmm.c b/openbsc/src/gprs/gprs_gmm.c
index cc9d297..0ed7162 100644
--- a/openbsc/src/gprs/gprs_gmm.c
+++ b/openbsc/src/gprs/gprs_gmm.c
@@ -38,6 +38,8 @@
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/rate_ctr.h>
 
+#include <osmocom/gprs/gprs_bssgp.h>
+
 #include <openbsc/debug.h>
 #include <openbsc/gsm_data.h>
 #include <openbsc/gsm_subscriber.h>
@@ -45,7 +47,6 @@
 #include <openbsc/gsm_04_08_gprs.h>
 #include <openbsc/paging.h>
 #include <openbsc/transaction.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/gprs_llc.h>
 #include <openbsc/gprs_sgsn.h>
 #include <openbsc/gprs_gmm.h>
diff --git a/openbsc/src/gprs/gprs_llc.c b/openbsc/src/gprs/gprs_llc.c
index 708c4c6..b26f263 100644
--- a/openbsc/src/gprs/gprs_llc.c
+++ b/openbsc/src/gprs/gprs_llc.c
@@ -26,12 +26,12 @@
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/talloc.h>
+#include <osmocom/gprs/gprs_bssgp.h>
 
 #include <openbsc/gsm_data.h>
 #include <openbsc/debug.h>
 #include <openbsc/gprs_sgsn.h>
 #include <openbsc/gprs_gmm.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/gprs_llc.h>
 #include <openbsc/crc24.h>
 #include <openbsc/sgsn.h>
diff --git a/openbsc/src/gprs/gprs_sgsn.c b/openbsc/src/gprs/gprs_sgsn.c
index 85f7105..d8da846 100644
--- a/openbsc/src/gprs/gprs_sgsn.c
+++ b/openbsc/src/gprs/gprs_sgsn.c
@@ -25,11 +25,12 @@
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/rate_ctr.h>
+#include <osmocom/gprs/gprs_ns.h>
+#include <osmocom/gprs/gprs_bssgp.h>
+
 #include <openbsc/gsm_subscriber.h>
 #include <openbsc/debug.h>
 #include <openbsc/gprs_sgsn.h>
-#include <openbsc/gprs_ns.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/sgsn.h>
 #include <openbsc/gsm_04_08_gprs.h>
 #include <openbsc/gprs_gmm.h>
diff --git a/openbsc/src/gprs/gprs_sndcp.c b/openbsc/src/gprs/gprs_sndcp.c
index e422426..853f8db 100644
--- a/openbsc/src/gprs/gprs_sndcp.c
+++ b/openbsc/src/gprs/gprs_sndcp.c
@@ -27,10 +27,10 @@
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/timer.h>
 #include <osmocom/core/talloc.h>
+#include <osmocom/gprs/gprs_bssgp.h>
 
 #include <openbsc/gsm_data.h>
 #include <openbsc/debug.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/gprs_llc.h>
 #include <openbsc/sgsn.h>
 
diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c
index 71694a4..a45d344 100644
--- a/openbsc/src/gprs/sgsn_libgtp.c
+++ b/openbsc/src/gprs/sgsn_libgtp.c
@@ -36,13 +36,13 @@
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/select.h>
 #include <osmocom/core/rate_ctr.h>
-#include <openbsc/gsm_04_08_gprs.h>
+#include <osmocom/gprs/gprs_bssgp.h>
 
+#include <openbsc/gsm_04_08_gprs.h>
 #include <openbsc/signal.h>
 #include <openbsc/debug.h>
 #include <openbsc/sgsn.h>
 #include <openbsc/gprs_llc.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/gprs_sgsn.h>
 #include <openbsc/gprs_gmm.h>
 
diff --git a/openbsc/src/gprs/sgsn_main.c b/openbsc/src/gprs/sgsn_main.c
index f7eb221..640388d 100644
--- a/openbsc/src/gprs/sgsn_main.c
+++ b/openbsc/src/gprs/sgsn_main.c
@@ -38,6 +38,9 @@
 #include <osmocom/core/rate_ctr.h>
 #include <osmocom/core/logging.h>
 
+#include <osmocom/gprs/gprs_ns.h>
+#include <osmocom/gprs/gprs_bssgp.h>
+
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
 
@@ -45,8 +48,6 @@
 #include <openbsc/debug.h>
 #include <openbsc/vty.h>
 #include <openbsc/sgsn.h>
-#include <openbsc/gprs_ns.h>
-#include <openbsc/gprs_bssgp.h>
 #include <openbsc/gprs_llc.h>
 
 #include <gtp.h>
diff --git a/openbsc/src/gprs/sgsn_vty.c b/openbsc/src/gprs/sgsn_vty.c
index 0125dad..f4a8083 100644
--- a/openbsc/src/gprs/sgsn_vty.c
+++ b/openbsc/src/gprs/sgsn_vty.c
@@ -28,7 +28,7 @@
 
 #include <openbsc/debug.h>
 #include <openbsc/sgsn.h>
-#include <openbsc/gprs_ns.h>
+#include <osmocom/gprs/gprs_ns.h>
 #include <openbsc/gprs_sgsn.h>
 #include <openbsc/vty.h>
 #include <openbsc/gsm_04_08_gprs.h>