php: multiple vulnerabilities

From the Mandriva advisory:

Multiple vulnerabilities has been found and corrected in php:

• Improved LCG entropy. (Rasmus, Samy Kamkar)
• Fixed safe_mode validation inside tempnam() when the directory path does not end with a /). (Martin Jansen)
• Fixed a possible open_basedir/safe_mode bypass in the session extension identified by Grzegorz Stachowiak. (Ilia)