If true the scheme will be treated as a standard scheme.
Standard schemes are subject to URL canonicalization and parsing rules as
defined in the Common Internet Scheme Syntax RFC 1738 Section 3.1 available
at http://www.ietf.org/rfc/rfc1738.txt
In particular, the syntax for standard scheme URLs must be of the form:
[scheme]://[username]:[password]@[host]:[port]/[url-path]
Standard scheme URLs must have a host component that is a fully qualified
domain name as defined in Section 3.5 of RFC 1034 [13] and Section 2.1 of
RFC 1123. These URLs will be canonicalized to "scheme://host/path" in the
simplest case and "scheme://username:password@host:port/path" in the most
explicit case. For example, "scheme:host/path" and "scheme:///host/path"
will both be canonicalized to "scheme://host/path". The origin of a
standard scheme URL is the combination of scheme, host and port (i.e.,
"scheme://host:port" in the most explicit case).
For non-standard scheme URLs only the "scheme:" component is parsed and
canonicalized. The remainder of the URL will be passed to the handler
as-is. For example, "scheme:///some%20text" will remain the same.
Non-standard scheme URLs cannot be used as a target for form submission.