MNCC: clarify naming / rename mncc_recv() to int_mncc_recv()

the int_ perfix (internal) symbolizes that this is the internal
MNCC handler code, receiving messages from the MNCC interface point.
diff --git a/openbsc/include/openbsc/mncc.h b/openbsc/include/openbsc/mncc.h
index 44f7a74..260c257 100644
--- a/openbsc/include/openbsc/mncc.h
+++ b/openbsc/include/openbsc/mncc.h
@@ -155,7 +155,7 @@
 };
 
 char *get_mncc_name(int value);
-int mncc_recv(struct gsm_network *net, int msg_type, void *arg);
+int int_mncc_recv(struct gsm_network *net, int msg_type, void *arg);
 void mncc_set_cause(struct gsm_mncc *data, int loc, int val);
 
 #endif
diff --git a/openbsc/src/bsc_hack.c b/openbsc/src/bsc_hack.c
index 0841ad2..66a9aaa 100644
--- a/openbsc/src/bsc_hack.c
+++ b/openbsc/src/bsc_hack.c
@@ -242,7 +242,7 @@
 	/* parse options */
 	handle_options(argc, argv);
 
-	rc = bsc_bootstrap_network(mncc_recv, config_file);
+	rc = bsc_bootstrap_network(int_mncc_recv, config_file);
 	if (rc < 0)
 		exit(1);
 	bsc_api_init(bsc_gsmnet, msc_bsc_api());
diff --git a/openbsc/src/mncc.c b/openbsc/src/mncc.c
index 180b626..328e96c 100644
--- a/openbsc/src/mncc.c
+++ b/openbsc/src/mncc.c
@@ -347,7 +347,8 @@
 }
 
 
-int mncc_recv(struct gsm_network *net, int msg_type, void *arg)
+/* Internal MNCC handler input function (from CC -> MNCC -> here) */
+int int_mncc_recv(struct gsm_network *net, int msg_type, void *arg)
 {
 	struct gsm_mncc *data = arg;
 	int callref;