mod_http_oauth2: Make allowed locales configurable Explicit > Implicit Instead of allowing anything after #, allow only the explicitly configured locales to be used. Default to empty list because using these is not supported yet. This potentially limits the size of the client_id, which is already quite large. Nothing prevents clients from registering a whole client_id per locale, which would not require translation support on this side.

mod_http_oauth2: Improve error messages for URI properties Since there are separate validation checks for URI properties, including that they should use https, with better and more specific error reporting. Reverts 'luaPattern' to 'pattern' which is not currently supported by util.jsonschema, but allows anything that retrieves the schema over http to validate against it, should they wish to do so.

mod_rest: Describe the error 'by' property in OpenAPI spec

mod_rest: List all error conditions in OpenAPI spec These are not handled by datamanager but by util.stanza and util.error, so they are not represented in the JSON schema file.

mod_http_oauth2: Make note about handling repeated RFC 6749 states > If an authorization code is used more than once, the authorization > server MUST deny the request and SHOULD revoke (when possible) all > tokens previously issued based on that authorization code. We should follow the SHOULD. The MUST is already covered by removing the code state from the cache.

mod_http_oauth2: Add TODO about disabling password grant Per recommendation in draft-ietf-oauth-security-topics-23 it should at the very least be disabled by default. However since this is used by the Snikket web portal some care needs to be taken not to break this, unless it's already broken by other changes to this module.

mod_http_oauth2: Disable CORS for authorization endpoint Per recommendation in draft-ietf-oauth-security-topics-23 Hopefully it is enough to return an error status, since mod_http will add CORS headers from a handler with higher priority, even for OPTIONS.

mod_http_oauth2: Make CSP configurable E.g. to enable forbidding all scripts if you don't use any scripts, or allow scripts from your separate static content domain, etc.

mod_http_oauth2: Link to RFC 7628 in README Links are good.

mod_http_oauth2: Use code spans for some config options in README To make them more recognisable as code things.