Changed gnutls_bye() to SHUT_WR as we don't wait for the peer to reply anyway

src/impl/dtlstransport.cpp

@@ -243,7 +243,7 @@ void DtlsTransport::runRecvLoop() {
 		PLOG_ERROR << "DTLS recv: " << e.what();
 	}
 
-	gnutls_bye(mSession, GNUTLS_SHUT_RDWR);
+	gnutls_bye(mSession, GNUTLS_SHUT_WR);
 
 	PLOG_INFO << "DTLS closed";
 	changeState(State::Disconnected);

src/impl/tlstransport.cpp

@@ -199,7 +199,7 @@ void TlsTransport::runRecvLoop() {
 		PLOG_ERROR << "TLS recv: " << e.what();
 	}
 
-	gnutls_bye(mSession, GNUTLS_SHUT_RDWR);
+	gnutls_bye(mSession, GNUTLS_SHUT_WR);
 
 	PLOG_INFO << "TLS closed";
 	changeState(State::Disconnected);