bsc: Call the RF Control interface ctrl all the way

We had the rf_ctrl_name and the rf_ctl pointer, make both use
the word ctrl.
diff --git a/openbsc/include/openbsc/osmo_msc_data.h b/openbsc/include/openbsc/osmo_msc_data.h
index 3212b36..59b75c3 100644
--- a/openbsc/include/openbsc/osmo_msc_data.h
+++ b/openbsc/include/openbsc/osmo_msc_data.h
@@ -65,7 +65,7 @@
 	char *mid_call_txt;
 	int mid_call_timeout;
 	char *rf_ctrl_name;
-	struct osmo_bsc_rf *rf_ctl;
+	struct osmo_bsc_rf *rf_ctrl;
 
 	/* ussd welcome text */
 	char *ussd_welcome_txt;
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index a290693..54d7c6e 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -189,9 +189,9 @@
 	dump_pchan_load_vty(vty, "    ", &pl);
 
 	/* show rf */
-	if (net->msc_data && net->msc_data->rf_ctl)
+	if (net->msc_data && net->msc_data->rf_ctrl)
 		vty_out(vty, "  Last RF Command: %s%s",
-			net->msc_data->rf_ctl->last_state_command,
+			net->msc_data->rf_ctrl->last_state_command,
 			VTY_NEWLINE);
 }
 
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_grace.c b/openbsc/src/osmo-bsc/osmo_bsc_grace.c
index c67984b..fbc26ac 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_grace.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_grace.c
@@ -26,9 +26,9 @@
 
 int bsc_grace_allow_new_connection(struct gsm_network *network)
 {
-	if (!network->msc_data->rf_ctl)
+	if (!network->msc_data->rf_ctrl)
 		return 1;
-	return network->msc_data->rf_ctl->policy == S_RF_ON;
+	return network->msc_data->rf_ctrl->policy == S_RF_ON;
 }
 
 static int handle_sub(struct gsm_lchan *lchan, const char *text)
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_main.c b/openbsc/src/osmo-bsc/osmo_bsc_main.c
index c9ae975..2a4ed1a 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_main.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_main.c
@@ -48,7 +48,7 @@
 
 struct gsm_network *bsc_gsmnet = 0;
 static const char *config_file = "openbsc.cfg";
-static const char *rf_ctl = NULL;
+static const char *rf_ctrl = NULL;
 extern const char *openbsc_copyright;
 static int daemonize = 0;
 
@@ -119,7 +119,7 @@
 			log_set_log_level(osmo_stderr_target, atoi(optarg));
 			break;
 		case 'r':
-			rf_ctl = optarg;
+			rf_ctrl = optarg;
 			break;
 		default:
 			/* ignore */
@@ -370,13 +370,13 @@
 	ctrl_cmd_install(CTRL_NODE_TRX, &cmd_trx_rf_lock);
 
 	data = bsc_gsmnet->msc_data;
-	if (rf_ctl)
-		bsc_replace_string(data, &data->rf_ctrl_name, rf_ctl);
+	if (rf_ctrl)
+		bsc_replace_string(data, &data->rf_ctrl_name, rf_ctrl);
 
 	if (data->rf_ctrl_name) {
-		data->rf_ctl = osmo_bsc_rf_create(data->rf_ctrl_name,
+		data->rf_ctrl = osmo_bsc_rf_create(data->rf_ctrl_name,
 						  bsc_gsmnet);
-		if (!data->rf_ctl) {
+		if (!data->rf_ctrl) {
 			fprintf(stderr, "Failed to create the RF service.\n");
 			exit(1);
 		}
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_rf.c b/openbsc/src/osmo-bsc/osmo_bsc_rf.c
index cd64b52..6e9e027 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_rf.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_rf.c
@@ -243,7 +243,7 @@
 	return 0;
 }
 
-static int rf_ctl_accept(struct osmo_fd *bfd, unsigned int what)
+static int rf_ctrl_accept(struct osmo_fd *bfd, unsigned int what)
 {
 	struct osmo_bsc_rf_conn *conn;
 	struct osmo_bsc_rf *rf = bfd->data;
@@ -338,7 +338,7 @@
 	}
 
 	bfd->when = BSC_FD_READ;
-	bfd->cb = rf_ctl_accept;
+	bfd->cb = rf_ctrl_accept;
 	bfd->data = rf;
 
 	if (osmo_fd_register(bfd) != 0) {