sync up shellinabox
After a long period of inactivity, https://github.com/shellinabox/shellinabox has become moderately active again, and there are security patches and fixes. Need to look merging in our local changes to a fork.
After a long period of inactivity, https://github.com/shellinabox/shellinabox has become moderately active again, and there are security patches and fixes. Need to look merging in our local changes to a fork.