forked from Mxmilu666/frp
- pkg/nathole: add RLock when reading clientCfgs map in PreCheck path to prevent concurrent map read/write crash - server/proxy: fix error variable shadowing in GetWorkConnFromPool that could return a closed connection with nil error - pkg/util/net: check ListenUDP error before spawning goroutines and assign readConn to struct field so Close() works correctly