oid/obfs4

镜像来自 https://git.torproject.org/pluggable-transports/obfs4.git/

Cecylia Bocovich 28e9e5ccce Prevent a crash if OnEvent is not called		1 周之前
..
snowflake.go	28e9e5ccce Prevent a crash if OnEvent is not called	1 周之前