Default to fetching from CDN first?

[Thor Lancelot Simon <tls%panix.com@localhost>]

Setting mk.conf like this:

MASTER_SITE_OVERRIDE=http://cdn.netbsd.org/pub/pkgsrc/distfiles/

Radically speeds up package builds for me.  Note that fall back to the
upstream listed in the package Makefile if the CDN doesn't have it still
seems to work fine.

Is there some reason we shouldn't set this as a default?

-- 
 Thor Lancelot Simon	                                     tls%panix.com@localhost
  "Whether or not there's hope for change is not the question.  If you
   want to be a free person, you don't stand up for human rights because
   it will work, but because it is right."	--Andrei Sakharov