Support CTFd site password

[TheNewJavaman]

Installing a challenge to a CTFd instance with a site password returns a HTTP 401 error.

Temporary fix

Edit site_password cookie in .ctf/config

[config]
url = https://my-instance.ctfd.io
access_token = ctfd_mytoken

[cookies]
site_password = my_site_password

[challenges]

Proposed solution

Add field site_password

[config]
url = https://my-instance.ctfd.io
access_token = ctfd_mytoken
site_password = my_site_password

[challenges]

I forked and am working on the proposed solution

[pl4nty]

The cookies section is deliberately separate #111

[ColdHeat]

I think the current solution is acceptable until the config file is entirely restructured.