Merge pull request acmesh-official#1001 from Neilpang/socat

Socat

Merge pull request acmesh-official#995 from Neilpang/dev

Dev

Merge pull request acmesh-official#894 from Neilpang/dev

Dev

Merge pull request acmesh-official#879 from Neilpang/dev

add debug message

Merge pull request acmesh-official#835 from Neilpang/dev

update doc

Merge pull request acmesh-official#778 from Neilpang/dev

Dev

Merge pull request acmesh-official#611 from Neilpang/backup

Backup

Merge pull request acmesh-official#536 from Neilpang/dev

Dev

Update README.md

fix for centos ncat and debian default netcat (acmesh-official#330)