conpty handle leak

[caarlos0]

If you run the ssh-allocatepty example on windows, and monitor the open handles by that process, you'll notice that each session leaves ~1 file handle behind.

On linux, everything seems to work fine.

Here's how I'm monitoring this:

linux

# in one shell:
watch -n1 'ls -l /proc/$(pidof ssh-allocatepty)/fd | wc -l'

# in another:
while true; do ssh -p2222 localhost; sleep 1; done

windows

# in one shell:
while(1) { cls; Get-Process | Where-Object {$_.Name -like "ssh-allocatepty"}; sleep 1}

# in another (the first column is the number of Handles open)
while(1) { cls; ssh -p 2222 localhost; sleep 1}