[UVF Exception] Sync php4 4.4.4 from Debian unstable

Reason:

Excerpt from the Debian changelog:

* New upstream release [4.4.4]
     - Added missing safe_mode/open_basedir checks inside the error_log(),
       file_exists(), imap_open() and imap_reopen() functions.
     - Fixed overflows inside str_repeat() and wordwrap() functions on 64bit
       systems.
     - Fixed possible open_basedir/safe_mode bypass in cURL extension.
       (CVE-2006-2563)
     - Fixed overflow in GD extension on invalid GIF images.
     - Fixed a buffer overflow inside sscanf() function. (CVE-2006-4020)
       (Closes: 382261)
     - Fixed memory_limit restriction on 64 bit system.

   * New upstream release [4.4.3]
     - Disallow certain characters in session names. (CVE-2006-3016)
     - Fixed a bug that would allow variable to survive unset().
       (CVE-2006-3017) (Closes: #382259)
     - Fixed a buffer overflow inside the wordwrap() function.
     - Prevent jumps to parent directory via the 2nd parameter of
       the tempnam() function.
     - Improved safe_mode check for the error_log() function.
     - Fixed cross-site scripting inside the phpinfo() function.