debugger: agent listens on 'any' address

[bnoordhuis]

$ node --debug-brk -e 'for(;;);'
Debugger listening on port 5858

# in another window
$ netstat -tlnp | grep node
tcp6       0      0 :::5858                 :::*                    LISTEN      18770/node

It used to listen on 127.0.0.1. The current behavior may be a security liability in production environments.

/cc @indutny

[Trott]

Would I be right to think that it's best to not fix this until #3316 lands (so that people who need it to listen on another IP can specify that IP)?

[bnoordhuis]

@Trott That's right.

[bnoordhuis]

Forgot to close this after landing #8106. Fixed by 8e7cbe2.