net: encapsulate fdwatch backend metadata

src/db/NetBase.cpp

@@ -37,6 +37,10 @@ bool CNetPoller::Create()
 		return false;
 	}
 
+	sys_log(0, "[STARTUP] fdwatch backend=%s descriptor_limit=%d",
+		fdwatch_backend_name(fdwatch_get_backend(m_fdWatcher)),
+		fdwatch_get_descriptor_limit(m_fdWatcher));
+
 	return true;
 }