Change the default for binaries in /bin and /sbin from statically to

Change the default for binaries in /bin and /sbin from statically to
dynamically linked. This has been a long time coming with the move of
critical libraries from /usr/lib to /lib. If you don't feel comfortable
with dynamically linked binaries in your root partition, now is the
time to define NO_DYNAMICROOT in your make.conf.

Approved by:	re