Description:
------------
When passing a URL/URI to parse_url() like "/foo/a:1" then false is returning. 

Causing fail parameter pattern: ^.*/[any]*[colon][digit]{1,5}$.

Test script:
---------------
$params = ["/a:1", "/a:11", "/a:111", "/a:1111", "/a:11111", "/a:111111", "/a", "/a:", "/a:b", "/a:b:", "/a:b:1"];
foreach ($params as $param) {
    $result = parse_url($param);
    if ($result === false) {
        printf("Failed: %s\n", $param);
    } else {
        printf("Passed: %s\n", $param);
    }
}

---

Failed: /a:1
Failed: /a:11
Failed: /a:111
Failed: /a:1111
Failed: /a:11111
Passed: /a:111111
Passed: /a
Passed: /a:
Passed: /a:b
Passed: /a:b:
Passed: /a:b:1