Adding support for parse URI for hostnames

[hyperbolic2346]

This PR is branched off of #1554 and a vast majority of the code is from that PR. Once that merges, this should reduce down to very little change.

This PR adds support for hostname parsing in parse uri. This adds the tests and exposes the functionality.

closes #1500

[thirtiseven]

Few mismatches from integration test cases:

url	cpu	gpu
http://[email protected]/path?query=1#Ref	spark.apache.org	null
https://use%20r:pas%[email protected]/dir%20/pa%20th.HTML?query=x%20y&q2=2#Ref%20two	example.com	example
http://userid:[email protected]:8080	example.com	null
http://userid:[email protected]:8080/	example.com	null
http://userid:[email protected]	example.com	exampl
http://userid:[email protected]/	example.com	exampl
http://-.~_!$&'()*+,;=:%40:80%2f::::::@example.com	example.com	null
http://.	null	.
http://..	null	..
http://../	null	..
http://.www.foo.bar/	null	.www.foo.bar
http://.www.foo.bar./	null	.www.foo.bar.

• URLs containing USERINFO are not handled correctly.
• hostnames have their own validation logic, they're generated by following syntax:

// hostname      = domainlabel [ "." ] | 1*( domainlabel "." ) toplabel [ "." ]
// domainlabel   = alphanum | alphanum *( alphanum | "-" ) alphanum
// toplabel      = alpha | alpha *( alphanum | "-" ) alphanum

[hyperbolic2346]

build

[thirtiseven]

All tests from plugin side passed (IT and the kaggle dataset), I think it's functional correct.

[hyperbolic2346]

build