Add RIG_CAPS_STATUS_CPTR

WSJT-X HamlibTransceiver.cpp now has no dependencies on structure offsets
https://github.com/Hamlib/Hamlib/issues/484

include/hamlib/rig.h

@@ -1953,7 +1953,8 @@ enum rig_caps_int_e {
 enum rig_caps_cptr_e {
     RIG_CAPS_VERSION_CPTR,
     RIG_CAPS_MFG_NAME_CPTR,
-    RIG_CAPS_MODEL_NAME_CPTR
+    RIG_CAPS_MODEL_NAME_CPTR,
+    RIG_CAPS_STATUS_CPTR
 };
 
 /**

src/misc.c

@@ -2120,6 +2120,9 @@ const char *rig_get_caps_cptr(rig_model_t rig_model, enum rig_caps_cptr_e rig_ca
     case RIG_CAPS_MODEL_NAME_CPTR:
         return caps->model_name;
 
+    case RIG_CAPS_STATUS_CPTR:
+        return rig_strstatus(caps->status);
+
     default:
         rig_debug(RIG_DEBUG_ERR, "%s: Unknown requested rig_caps value=%d\n", __func__, rig_caps);
         return "Unknown caps value";