ROCKCFG_PKG_DANSGUARDIAN_SQUID
  This adds the Follow X-Forwarded-For support to Squid.  This is needed 
  if you wish to use ACLs on clients accessing through DansGuardian.
ROCKCFG_PKG_DANSGUARDIAN_DGVIRUS
  This adds Virus Scanning support to DansGuardian using the 
  DansGuardian Anti-Virus Plugin.