PLT-3412 WebRTC Server side & System Console (#3706)

* WebRTC Server side

* WebRTC System Console

* Consistency on variable names

* Add turn and stun uri validation

api/user.go

@@ -735,6 +735,10 @@ func RevokeSessionById(c *Context, sessionId string) {
 				c.Err = result.Err
 			}
 		}
+
+		if webrtcInterface := einterfaces.GetWebrtcInterface(); webrtcInterface != nil {
+			webrtcInterface.RevokeToken(session.Id)
+		}
 	}
 }
 
@@ -757,6 +761,10 @@ func RevokeAllSession(c *Context, userId string) {
 					return
 				}
 			}
+
+			if webrtcInterface := einterfaces.GetWebrtcInterface(); webrtcInterface != nil {
+				webrtcInterface.RevokeToken(session.Id)
+			}
 		}
 	}
 }
@@ -778,6 +786,10 @@ func RevokeAllSessionsNoContext(userId string) *model.AppError {
 					return result.Err
 				}
 			}
+
+			if webrtcInterface := einterfaces.GetWebrtcInterface(); webrtcInterface != nil {
+				webrtcInterface.RevokeToken(session.Id)
+			}
 		}
 	}
 	return nil