More specific type for 'port' component of 'parse_url()'

[thg2k]

The port component can only be in the range 0-65535:

<?php
var_dump(parse_url("http://localhost:-1/"));    // false
var_dump(parse_url("http://localhost:0/"));     // [ ... ]
var_dump(parse_url("http://localhost:65535/")); // [ ... ]
var_dump(parse_url("http://localhost:65536/")); // false

[thg2k]

I'm sorry I just realized I missed a couple of tests, gotta love that CI.

Made another force push to fix that, let me know if there are other outstanding issues.

[ondrejmirtes]

gotta love that CI.

Yeah, I'm super-proud of that, thanks :)

And thanks for this PR!