…ved by thredds"

In PR #359:

`secure-thredds/config/magpie/permissions.cfg` started to use variable
but was never renamed to `.template` so those variable never get
template expanded (commit 317d96c).

`bootstrap-testdata` default value was removed but did not source
`read-configs.include.sh` so the variable stayed blank (commit
4ab0fc7).  The default value was there
initially so the script can be used in standalone situation (not inside a
checkout).

… for data served by thredds"

See
#478 (comment)

…OOT comes from