github.com/sagernet/sing@v0.2.6/common (about) abx atomic auth baderror batch buf bufio cache canceler closer.go cond.go context.go context_compat.go context_lagacy.go control debug domain exceptions format logger low_memory.go low_memory_stub.go metadata network ntp observable random ranges replay rw shell string.go task tls udpnat unsafe.go unsafe_default.go unsafe_disable.go uot upstream.go windnsapi wininet x