Description:
------------
parse_url does not parses 'scheme:path' when path consists of numbers only. 

skype:anojszewski is parsed right.
gg:9130731 is parsed wrong (whole URL is treated as path).


Tested on versions 5.1.2 and 4.4.2.

Adam Nojszewski

Reproduce code:
---------------
print_r(parse_url("skype:anojszewski"));
print_r(parse_url("gg:9130731"));


Expected result:
----------------
Array
(
    [scheme] => skype
    [path] => anojszewski
)
Array
(
    [scheme] => gg
    [path] => 9130731
)

Actual result:
--------------
Array
(
    [scheme] => skype
    [path] => anojszewski
)
Array
(
    [path] => gg:9130731
)