8.3.1.51. v4.2.0-beta9

commit 975b55a8058db60e5f9af2261891c6e7134c7729
Author: Greg Althaus <galthaus@austin.rr.com>
Date:   Thu Dec 19 12:30:22 2019 -0600

    Allow agent to generate a discernable error on exit.

M   agent/agent.go

commit 85cb313b2ad782898f97ec1b82de39c729dbc916
Author: Shane Gibson <shane@rackn.com>
Date:   Thu Dec 19 09:44:00 2019 -0800

    Fix Sprig URL; remove errant MacOS poo

M   doc/arch/provision.rst
M   doc/faq-troubleshooting.rst
D   doc/ux/.DS_Store

End of Note