Add config for glangci-lint, lint, handle "wire" errors fo auth procedure

xmpp_ping.go

@@ -8,13 +8,16 @@ func (c *Client) PingC2S(jid, server string) error {
 	if jid == "" {
 		jid = c.jid
 	}
+
 	if server == "" {
 		server = c.domain
 	}
+
 	_, err := fmt.Fprintf(StanzaWriter, "<iq from='%s' to='%s' id='c2s1' type='get'>\n"+
 		"<ping xmlns='urn:xmpp:ping'/>\n"+
 		"</iq>",
 		xmlEscape(jid), xmlEscape(server))
+
 	return err
 }
 
@@ -23,16 +26,18 @@ func (c *Client) PingS2S(fromServer, toServer string) error {
 		"<ping xmlns='urn:xmpp:ping'/>\n"+
 		"</iq>",
 		xmlEscape(fromServer), xmlEscape(toServer))
+
 	return err
 }
 
 func (c *Client) SendResultPing(id, toServer string) error {
 	_, err := fmt.Fprintf(StanzaWriter, "<iq type='result' to='%s' id='%s'/>",
 		xmlEscape(toServer), xmlEscape(id))
+
 	return err
 }
 
-// PingResponse responding to ping query according to xep-0199
+// PingResponse responding to ping query according to xep-0199.
 func (c *Client) PingResponse(v IQ) (string, error) {
 	return c.RawInformation(
 		v.To,