Partially address several years of neglect of pubcookie. Indicate the
security issues in two two ports.
I've not use pubcookie in several year and given the lack of complaint
about the deprication of mod_pubcookie, I doubt anyone else uses it from
ports. The mod_pubcookie port has already expired and I've set a two
week expriation for pubcookie-login-server. If not maintainer
appears I will send both to the Attic on June 6th.
While I'm here, address the use of CONF_FILES and CONF_DIRS in
pubcookie-login-server to avoid getting in the way of progress. 
PR: ports/157164