Maxfield Lehman

Kill sshd on SIGTERM instead of waiting for docker stop timeout.

1

Since `sh` ignores SIGTERM, `docker stop` must wait for the timeout (default ten seconds). By passing SIGTERM through to `sshd`, this wait is avoided.

Installing to /usr/bin by default requires elevated permissions. Changing the prefix in the makefile to /usr/local allows unprivileged install.