Token scheme definition framework for OAuth 2.0
a host-wide counter
the default factory for token schemes
hash functions and encodings
defines 'token_accept'
implement bearer token schemes
the 'current_secret' option group
the 'format' option group and 'token_validate'
implement http_hmac token scheme
the 'v_id_next', 'counter', and 'random' option groups
defines the root group setup
the 'transport' option group and helper functions
the 'vtable', 'vtable_cache', and 'vtable_pull_queue' option groups
poor man's mixin/role closure builder
functions for creating option groups and default values
random number generator interface