mailman and binary paths

[Filip Hajny <filip%joyent.com@localhost>]

I intend to fix these three variables set in Mailman's Defaults.py.in settings 
file:

HTML_TO_PLAIN_TEXT_COMMAND = '/usr/bin/lynx -dump %(filename)s'
POSTFIX_ALIAS_CMD = '/usr/sbin/postalias'
POSTFIX_MAP_CMD = '/usr/sbin/postmap'

I wonder why nobody hit this before - is Postfix/Lynx present as native 
software on NetBSD? Don't want to break anybody's world. I'd just replace with 
${PREFIX} here - they are not true dependencies (e.g. there are three ways to 
plug Mailman into Postfix, and the post* tools are only needed for one).

--
Filip Hajny
Joyent Inc.