mod_http_oauth2: Fix removal of consumed authorization codes Fixes mod_http_oauth2.lua:34: bad argument #2 to 'difftime' (number expected, got nil) The extra preceding argument to :set stored the client-id#code as a value instead of clearing the key, and then later in the periodic cleanup timer this string would be indexed, producing a nil and a traceback

This module helps reduces power usage of inactive mobile clients while
another client is actively used. E.g. in the case of chatting on a
desktop computer, instantly pushing messages to a phone in someones
pocket is not the best use of radio time.

Works with [mod_csi_simple][doc:modules:mod_csi_simple] which is
included with Prosody since 0.11