Function setHashURL

Creates an URL based on original one, but with hash substituted by the given hash URL.

The hash URL is substituted as following:

1. If the hash URL's origin is not the same as the one of the base one, or if it contains a username, then absolute hash URL is substituted:
2. Otherwise:
   • pathname is substituted, unless it is equal to / and no hash and search parameters present,
   • search parameters are substituted when at least one present,
   • hash is substituted only when present.

Input URLs are never altered.

Returns

URL with updated hash.