cups security update

[1:1.4.2-50:.4]

• Added BrowseLDAPCACertFile and PrintcapGUI to restricted options
  list.
  [1:1.4.2-50:.3]
• Fix for CVE-2012-5519 patch: handle blacklisted lines that have no
  value part gracefully.
  [1:1.4.2-50:.2]
• Added documentation for new CVE-2012-5519 option.
  [1:1.4.2-50:.1]
• Applied patch to fix CVE-2012-5519 (privilege escalation for users
  in SystemGroup or with equivalent polkit permission). This prevents
  HTTP PUT requests with paths under /admin/conf/ other than that for
  cupsd.conf, and also prevents such requests altering certain
  configuration directives such as PageLog and FileDevice (bug #875898).
  [1:1.4.2-50]
• Fixed LDAP browsing issues (bug #870386).
  [1:1.4.2-49]
• Avoid ‘forbidden’ error when moving job between queues via web UI
  (bug #834445).