move to libcommon-cs: net init 1: rename to bsc_network_init

The gsm_network_init() function initializes a whole lot of BSC specific stuff.
Aiming to move some of it to libcommon-cs, first rename it to bsc_network_init().
This will retain the BSC specific stuff when the move is done.

Adjust all callers.

Future: osmo-cscn will call the more generic part and not the BSC specific
part.

Change-Id: I4816ae19374390fc5c64972f7cad2e9ec3d8bcc3
diff --git a/openbsc/src/libbsc/net_init.c b/openbsc/src/libbsc/net_init.c
index da13a52..07a4423 100644
--- a/openbsc/src/libbsc/net_init.c
+++ b/openbsc/src/libbsc/net_init.c
@@ -17,13 +17,14 @@
  *
  */
 
+#include <openbsc/osmo_bsc.h>
 #include <openbsc/gsm_data.h>
 #include <openbsc/osmo_msc_data.h>
 #include <openbsc/gsm_subscriber.h>
 
 #include <stdbool.h>
 
-struct gsm_network *gsm_network_init(void *ctx,
+struct gsm_network *bsc_network_init(void *ctx,
 				     uint16_t country_code,
 				     uint16_t network_code,
 				     mncc_recv_cb_t mncc_recv)