It's 2022 and the WHATWG no longer recognizes the term URI. Everything
is now a URL or a type of URL. Which is great because it's way less
confusing. Details here:
https://url.spec.whatwg.org/
Moves hash_util.by_stream_uri and hash_util.by_stream_topic_uri to
internal_url so they can be used by external codebases. Due to these
functions being called in many places in the web codebase, wrappers
for both functions are left in hash_util in order to keep these
calls simple.
Also adds test for explicitly testing each function.
Move hash_util.encode_stream_id to internal_url, so it can be shared
with external codebases. Also add a test that explicitly tests escaping
special characters in stream names.
Move stream_data.id_to_slug to internal_url, making it shareable. The
function has been renamed to stream_id_to_slug to reflect that it
operates on a stream id.
Moves the encodeHashComponent and decodeHashComponent functions out of
hash_util and into internal_url which belongs to shared. This is to
accommodate sharing of this code with mobile or any other codebases that
do not wish to duplicate logic.