Description:
------------
imap_open('/localfile', '', '')

fails on Windows, but works on Linux.

I get this in the error log for Windows:
[Mon Dec 18 16:18:56 2006] [error] [client 127.0.0.1] PHP Warning:  imap_open() [<a href='function.imap-open'>function.i
map-open</a>]: Couldn't open stream C:/www/complaints.com/data/testdos.mbox in C:\\www\\complaints.com\\imap_bug.php on
line 9
[Mon Dec 18 16:18:56 2006] [error] [client 127.0.0.1] PHP Notice:  Unknown: Can't open mailbox C:/www/complaints.com/dat
a/testdos.mbox: no such mailbox (errflg=2) in Unknown on line 0

Note that it's neither a path nor permissions problem, as fopen(..., 'r') and fgets() succeed.

Also note that it is not a cr/lf problem as the testunix.mbox and testdos.mbox files are identical except for ^M at the ends.

Linux happily works with either line-ending.
Windows just plain doesn't work.

The Linux box is running 5.1.4, while the Windows is running 5.2.0, so it *could* be a change from 5.1.4 to 5.2.0

Reproduce code:
---------------
http://acousticdemo.com/complaints/imap_bug.phps


Expected result:
----------------
Linux Output:
http://acousticdemo.com/complaints/imap_bug.php


Actual result:
--------------
Line 1 of testdos.mbox: From "Richard Lynch" Fri Dec 15 17:13:48 2006

Line 1 of testunix.mbox: From "Richard Lynch" Fri Dec 15 17:13:48 2006

Failed to imap_open(C:/www/complaints.com/data/testdos.mbox)
array(1) {
  [0]=>
  string(75) "Can't open mailbox C:/www/complaints.com/data/testdos.mbox: no such mailbox"
}
bool(false)
 messages in C:/www/complaints.com/data/testdos.mbox:

bool(false)
bool(false)



Failed to imap_open(C:/www/complaints.com/data/testunix.mbox)
bool(false)
array(1) {
  [0]=>
  string(76) "Can't open mailbox C:/www/complaints.com/data/testunix.mbox: no such mailbox"
}
 messages in C:/www/complaints.com/data/testunix.mbox: