From d0f2b492ac6654d1450063256f76c14bb20506ed Mon Sep 17 00:00:00 2001
From: Wichert Akkerman <wichert@wiggy.net>
Date: Sat, 12 Oct 2019 20:47:16 +0200
Subject: [PATCH] Fix XMPP TLS config

---
 xmpp_transport.go | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/xmpp_transport.go b/xmpp_transport.go
index 9b483cb..2530b82 100644
--- a/xmpp_transport.go
+++ b/xmpp_transport.go
@@ -35,11 +35,13 @@ func (t XMPPTransport) IsSecure() bool {
 
 func (t *XMPPTransport) StartTLS(domain string) error {
 	if t.Config.TLSConfig == nil {
-		t.Config.TLSConfig = &tls.Config{}
+		t.TLSConfig = &tls.Config{}
+	} else {
+		t.TLSConfig = t.Config.TLSConfig.Clone()
 	}
 
-	if t.Config.TLSConfig.ServerName == "" {
-		t.Config.TLSConfig.ServerName = domain
+	if t.TLSConfig.ServerName == "" {
+		t.TLSConfig.ServerName = domain
 	}
 	tlsConn := tls.Client(t.conn, t.TLSConfig)
 	// We convert existing connection to TLS