[#30BBF499D0BA121AC481D9C588E17E5BCB30D3F7]
Set the userinfo.
url_base& set_encoded_userinfo(pct_string_view s);
The userinfo is set to the given string, which may contain percent-escapes. Escapes in the string are preserved, and reserved characters in the string are percent-escaped in the result. The effects on the user and password depend on the presence of a colon (':') in the string:
The interpretation of the userinfo as individual user and password components is scheme-dependent. Transmitting passwords in URLs is deprecated.
assert( url( "http://example.com" ).set_encoded_userinfo( "john%20doe" ).user() == "john doe" );
Linear in `this->size() + s.size()`.
Strong guarantee. Calls to allocate may throw. Exceptions thrown on invalid input.
userinfo = [ [ user ] [ ':' password ] ]
user = *( unreserved / pct-encoded / sub-delims )
password = *( unreserved / pct-encoded / sub-delims / ":" )