util.jwt: Document interface as Teal definition file

mod_authz_internal: Fix wrong role name field in user_can_assume_role() Made it reject the primary role since it compares against a non-existent field, i.e. nil.

Merge 0.12->trunk

mod_http: Unhook CORS handlers only if active (fixes #1801)

mod_admin_shell: Show reverse dependencies in module:info() Why was this module loaded? Now you can find out!

core.moduleapi: Record reverse dependencies Useful to know why a module was auto-loaded without having to dig trough all other modules for the one that depends on it.

authz: Add method for retrieving all roles Some of the OAuth stuff highlights a small need to retrieve a list of roles somehow. Handy if you ever need a role selector in adhoc or something. Unless there's some O(n) thing we were avoiding?

mod_tokenauth: Fix misplaced closing parenthesis `type(x ~= y)` is always a string, thus truthy

util.sasl.oauthbearer: Fix traceback on authz in unexpected format E.g. if you were to just pass "username" without @hostname, the split will return nil, "username" and the nil gets passed to saslprep() and it does not like that.

mod_tokenauth: Gracefully handle missing tokens