fix symlink issue on windows for goctl (zeromicro#1034)

* fix symlink issue on windows for goctl

* move readlink into separate file

update goctl version to 1.1.10 (zeromicro#874)

fix issue zeromicro#861 (zeromicro#862)

* fix issue zeromicro#861

* fix issue zeromicro#861

Co-authored-by: anqiansong <anqiansong@xiaoheiban.cn>

refactor mapping (zeromicro#782)

update readme (zeromicro#673)

optimize code (zeromicro#579)

* optimize code

* optimize returns & unit test

fix golint issues (zeromicro#535)

fix type convert error (zeromicro#395)

simplify cgroup controller separation (zeromicro#384)

simplify cgroup controller separation (zeromicro#384)