Fix panic with configurations with multiple event socket connections

CONTRIBUTORS.md

@@ -76,6 +76,7 @@ information, please see the [`CONTRIBUTING.md`](CONTRIBUTING.md) file.
 | @JDLK7 | Jose Domenech |
 | @mintos5 | Michal Škuta |
 | @playingbogart | Eugene Bozhet |
+| @htrendev | Hristo Trendev |
 
 <!-- to sign, include a single line above this comment containing the following text:
 | @username | First Last |

agents/fsagent.go

@@ -296,11 +296,11 @@ func (sm *FSsessions) Connect() error {
 		}
 		sm.conns[connIdx] = fSock
 		utils.Logger.Info(fmt.Sprintf("<%s> successfully connected to FreeSWITCH at: <%s>", utils.FreeSWITCHAgent, connCfg.Address))
-		go func() { // Start reading in own goroutine, return on error
-			if err := sm.conns[connIdx].ReadEvents(); err != nil {
+		go func(fsock *fsock.FSock) { // Start reading in own goroutine, return on error
+			if err := fsock.ReadEvents(); err != nil {
 				errChan <- err
 			}
-		}()
+		}(fSock)
 		fsSenderPool, err := fsock.NewFSockPool(5, connCfg.Address, connCfg.Password, 1, sm.cfg.MaxWaitConnection,
 			make(map[string][]func(string, int)), make(map[string][]string), utils.Logger.GetSyslog(), connIdx)
 		if err != nil {