Error makes exit code meaningful

Provides an easy way of handling exit signals in go by providing a context

Manage the exit functions of the program.

graceful,safty exit your golang program.

Vpn Leak Identifier * Kill Switch Leak Test * Exit IP (IPv4/IPv6) Test * Test your VPN

Wraps errors with exit code information and conversely produces meaningful exit codes based on errors.

Finally respect your damn deferred function calls on `err != nil`

A go (golang) library to cover some boilerplate that I've written too many times: allowing child routines to signal all other routines to exit, while playing nicely with os.Interrupt.