http_digest:http_digest

Formulate a reply to a digest authentication request. Options:

path(+Path): The request URI send along with the authentication. Defaults to /
method(+Method): The HTTP method. Defaults to 'GET'
nc(+Integer): The nonce-count as an integer. This is formatted as an 8 hex-digit string.

Arguments:

`Challenge`	- is a list Name(Value), normally from http_parse_digest_challenge/2. Must contain `realm` and `nonce`. Optionally contains `opaque`.
`User`	- is the user we want to authenticated
`Password`	- is the user's password
`Options`	- provides additional options