uri-authority uri &optional userinfo => value
(setf uri-authority) value uri => value
The authority string combining the host, port and userinfo. The full format is as follows:
The result is
all the component are
nil or prohibited by the userinfo parameter.
One of the following symbols is allowed as the userinfo:
Any other value of userinfo is equivalent to
(setf uri-authority) splits the value
specified as the parse-uri does.
RFC3986 deprecates the password component.
"Applications should not render as clear text any data after the first colon ':'. Applications may choose to ignore or reject such data when it is received as part of a reference and should reject the storage of such data in unencrypted form."