v4.0.0-pre13

commit a124ee53608b0a65f1fc2956f561cbbdb9689fe7
Author: Greg Althaus <galthaus@austin.rr.com>
Date:   Mon Aug 5 09:26:26 2019 -0500

    Fix race condition in plugin controller startup.  This has
    been there forever.  Could be cleaned-up some more, but good
    enough for now.

M   backend/dataTracker.go
M   go.sum

End of Note