/var/spool/lock becomes uucp.dialer, mode 1775, and serial devices
become uucp.dialer, mode 660.
(A couple of "dead" MAKEDEVs have been updated because they conformed the
the old permission scheme, while others have not because they didn't.)
"The mailwrapper program is designed to replace /usr/sbin/sendmail and to
invoke an appropriate MTA instead of sendmail(8) based on configuration
information placed in /etc/mailer.conf. This permits the administrator to
configure which MTA is to be invoked on the system at run time."
OK deraadt, millert
