#3803: Investigate installing the VDT without CA Certificates

Doug Olson suggested we just drop the doegrids subdirectory, and not
do any more messing with grid-cert-request or related just (like the
ssl configuration stuff).

Dropping the doegrids directory happens for now in the VDT 1.2 branch.
It's icky, but that's what it is.

Once we do that, I think you have the technical bits ready to go,
right? The things that I know we need to think about:

- It's our goal to release an update to VDT 1.10.1 on September 8th
with all of these changes.

- vdt-update-certs will have to insist upon have cacerts_url defined
in the configuration file: no default.

- the configuration file will have to list the VDT's CA certificate
distribution and the OSG CA certificate distribution, with comments
about both.

- We have to move the location for the VDT CA certificate distribution
to a different URL, to force people to get this update and make a
choice.

- We have to figure out everywhere that needs the documentation to be
tweaked

- We have to tweak the run-time docuemntation: post-install/README,
and maybe a prominent message to stdout.

I think this touches on everything. Did I miss anything?

I should be in on Tuesday, and available to talk about it.