Description:
------------
mkdir does parse :// in argument as schema/protocol and truncates the string resulting in wrong directory being created.

Possibly more functions affected (fopen, ...).

mkdir("/var/tmp/http://foobar", 0700, true);
mkdir("/var/tmp/abcd://barbaz", 0700, true);

Creates wrong directories.

Test script:
---------------
% find foobar /var/tmp/http:

find: `foobar': No such file or directory
find: `/var/tmp/http:': No such file or directory

% ~/php546/bin/php -r 'var_dump(mkdir("/var/tmp/http://foobar", 0700, true));'
bool(true)

% find foobar /var/tmp/http:

foobar
find: `/var/tmp/http:': No such file or directory


==> PHP created directory 'foobar' in current working directory

Expected result:
----------------
directory "/var/tmp/http:" is created
directory "/var/tmp/http:/foobar" is created

like gnu mkdir:

% mkdir -p "/var/tmp/http://foobar"

% find /var/tmp/http:

/var/tmp/http:

/var/tmp/http:/foobar


Actual result:
--------------
directory "foobar" is created in current working directory