Adapt chains h (main request handler) main handler to adapters (middleware handlers) Please note that the order of execution for `adapters` is FIFO (adapters[0] will be executed first).

ShowMultipleChoices is used when a user requests a resource in a manifest which results in ambiguous results.

browser API for registering bzz url scheme handlers: https://developer.mozilla.org/en/docs/Web-based_protocol_handlers electron (chromium) api for registering bzz url scheme handlers: https://github.com/atom/electron/blob/master/docs/api/protocol.md.