use correct function from free bsd pthread

llarp/util/threading.cpp

@@ -21,15 +21,16 @@ namespace llarp
       const int rc = pthread_setname_np(name.c_str());
 #else
 #ifdef __FreeBSD__
-      pthread_setname_np(pthread_self(), name.c_str());
+      const int rc = pthread_setname_np(pthread_self(), name.c_str(), nullptr);
 #else
       const int rc = pthread_setname_np(pthread_self(), name.c_str());
+#endif
       if(rc)
       {
         LogError("Failed to set thread name to ", name, " errno = ", rc,
                  " errstr = ", strerror(rc));
       }
-#endif
+
 #endif
 #else
       LogInfo("Thread name setting not supported on this platform");