Security update for php5 (important)

This update for php5 fixes the following security issues:

• CVE-2016-4073: A remote attacker could have caused denial of service, or
  possibly execute arbitrary code, due to incorrect handling of string
  length calculations in mb_strcut() (bsc#977003)
• CVE-2015-8867: The PHP function openssl_random_pseudo_bytes() did not
  return cryptographically secure random bytes (bsc#977005)
• CVE-2016-4070: The libxml_disable_entity_loader() setting was shared
  between threads, which could have resulted in XML external entity
  injection and entity expansion issues (bsc#976997)
• CVE-2015-8866: A remote attacker could have caused denial of service due
  to incorrect handling of large strings in php_raw_url_encode()
  (bsc#976996)
• CVE-2016-4071: A remote attacker could have caused denial of service, or
  possibly execute arbitrary code, due to incorrect handling of string
  formatting in php_snmp_error() (bsc#977000)