Changing the base public URL is still possible (which may be useful
if someone wants to use a reverse proxy without adding subdomains).

Fixes #195

add several of my plugins

Fix must_consume_args

Fix choosing SPDX license during plugin init

[skip ci]

Add 3rd party redactbot

The keys used to be lower case, but were changed to mixed case
in this commit:

068e268c

The identfier are now used as inputted by the user.