ctrl: separate config structure

Moving configuration data from anonymous struct into shared header as a
preparation for ctrl logging improvements in follow-up patches.

Change-Id: I3520e14ca6e1b8e270dbd4b1bf2378fe486991ce
Related: SYS#2655
diff --git a/src/osysmon_ctrl.c b/src/osysmon_ctrl.c
index 4aa7a1d..c2d0725 100644
--- a/src/osysmon_ctrl.c
+++ b/src/osysmon_ctrl.c
@@ -38,14 +38,7 @@
 struct ctrl_client {
 	/* links to osysmon.ctrl_clients */
 	struct llist_head list;
-	struct {
-		/* name of this CTRL client */
-		const char *name;
-		/* remote host/IP */
-		const char *remote_host;
-		/* remote CTRL port */
-		uint16_t remote_port;
-	} cfg;
+	struct ctrl_cfg cfg;
 	struct simple_ctrl_handle *sch;
 	/* list of ctrl_client_get_var objects */
 	struct llist_head get_vars;