Merged oacs-5-6 to HEAD. HEAD now installs and passes all core tests. There may still be some lingering problems due to my screwing up the oacs-5-6 branch earlier, I'll be looking into this later.
Implements TIP #140. Rollout support params are package parameters now (instead of config.tcl ones). ns_sendmail is now deprecated but provided as a wrapper to acs_mail_lite::send for backward compatibility.