Implement followup for ext/uri

[kocsismate]

It has the following features following up the original URI RFC (https://wiki.php.net/rfc/url_parsing_api):

• URI builder
• Query string manipulation
• Retrieving/modifying path segments as an array
• Retrieving the host type (e.g. IPv4, IPV6, domain name etc.)
• Deciding if the WHATWG URL is special (whether it uses the HTTP, HTTPS, FTP etc. schemes)
• Dedicated support for percent-encoding/decoding