add an extra ssh pub key to elabman so that the user can log into
new boss, since when setting up a rack all existing accounts are
deleted. Store this key as ~/.ssh/elabinelab.pub.

https://github.com/vlamanna/BootstrapFormHelpers

This is either because we could not get the lock or because it was in use
and could not be destroyed. A subsequent pass of the daemon should try again.

1. Add set-readonly method to a NS blockstore object.
2. Make sure that dataset blockstores (leases) in the 'grace' state can
   *only* be accessed read-only.

What has not been done yet is to pass the attribute to the storage server
and client so they can actually enact read-only-ness.

Based on suggestions from <ahelsing@bbn.com>.

This gives us a way to always CC a particular address (note that
this is different from archivemail, which makes a separate message)

A closer inspection of the 'fedora' case that I had been using revealed
that a few changes needed to be made for the CentOS 6 environment.  This
is loosely based on the fedora15 case, but stripped down and cleaned up
some.

Leigh B Stoller authored Dec 05, 2013 and Gary Wong committed Jan 08, 2014

This was a pointless path to follow since every browser is
different in how/when/why it does the window unload event, so
in fact I will have to hack shellinboxd to timeout out after a
reasonable amount of time.

This is a drawback of not using real web sockets; there is no
way for the backend to know when the browser window is gone.