Description:
------------
When trying to read a file or directory via the ssh2.sftp protocol wrapper which contains a '#' in the path ssh2.sftp will ignore it. It looks like it treats the '#' as a start comment command (e.g. // in PHP)

In the test script, i have used the following directory structure:

#Test/
    a
Test#/
    b
Test/
    c

Note that creating the directories from the bash shell requires escaping the # with a \, e.g.: mkdir \#Test

Reproduce code:
---------------
// $sftp is a ssh2_sftp resource
// $dir is the directory containing the test directory structure (see description)
$root = "ssh2.sftp://$sftp/$dir";

$a = scandir("$root/#Test");
// $a = array(".", "..", "#Test", "Test#", "Test");
// Note that $a is a dir listing of $root, everything after the # is ignored

$b = scandir("$root/Test#");
// $b = array(".", "..", "c");
// Gives a listing of Test not of Test#

Expected result:
----------------
$a = array(".", "..", "a");
$b = array(".", "..", "b");


Actual result:
--------------
$a = array(".", "..", "#Test", "Test#", "Test");
$b = array(".", "..", "c");