update

refactor limiter
fix getLink bug
add connection limit
move limit config to ControllerConfig
del dynamic speed limit (next version will be re add)
del online ip sync (next version will be re add)

conf/conf.go

@@ -67,7 +67,7 @@ func (p *Conf) Watch(filePath string, reload func()) error {
 				}
 			case err := <-watcher.Errors:
 				if err != nil {
-					log.Panicf("watcher error: %s", err)
+					log.Printf("File watcher error: %s", err)
 				}
 			}
 		}