Description:
------------
move_uploaded_file() uses VCWD_CHMOD(new_path, 0666 & ~oldmask). This breaks acls of uploaded files when umask is set to 077

The setup is as follows:
- all files are owned by user:user
- all files have 600 perms, dirs have 700
- PHP script is invoked as user:user (suexec+fcgid)
- ACLs are used to grant access for apache user (user:apache:r-x, default:user:apache:r-x) on all files and dirs.
- umask set to 077

When file is uploaded to upload_tmp_dir getfacl shows:
user::rw-
user:apache:r-x                 #effective:r--
group::---
mask::r--
other::---

After calling move_uploaded_file() the file in dest_dir has following ACLs:
user::rw-
user:apache:r-x                 #effective:---
group::---
mask::---
other::---

chmod(600) invoked in this case in move_uploaded_file() changes ACL mask to 000 which in turn revokes access for apache user.

Expected result:
----------------
Preserve ACL of uploaded files.

Actual result:
--------------
ACL get broken after calling move_uploaded_file()