Add/Delete sites to match what we host.

[dean]

Given a text file with a list of moodle directories + subdomains (example included in config/) this corrects ORVSD sites to match it. It also checks if sites in the file have the default nginx page to prevent unused sites from getting into the db.

[dean]

r?

[dean]

Cleaned up the codebase in that spot. r?

[Kennric]

I'd prefer not putting the list of sites in the repo - this is something we hopefully will only need to do once, but worst case only rarely - if we need to do it again, we will want to re-generate that site list. Can we have the management command take a filename on the command line, and just require an admin to bring their own file of sites? (also, document the format and origin of that file).

[dean]

The current way to run the update_sites command requires an input file of sites. The required format for the input file is in the docstring for the command and if the file isn't in the correct format (being that the parser does not find any sites in the input file) then the program will exit as to not purge all existing sites.

The current command to run is as follows:

python manage.py update_sites -d <filename_of_sites_list>

I'll remove the list of sites from the repo.

[dean]

Removed the sites file. r?

[Kennric]

Looks good +1