1. Update the list of Intel chips which have EM64T and can run the amd64    port.
1. Update the list of Intel chips which have EM64T and can run the amd64
   port.

2. Increase the known working maximum memory configuration from
   8gb to 32gb.

PR:		docs/102148 (1)
Submitted by:	Mike Meyer <mwm@mired.org> (1 - partially)
Reviewed by:	hrs
Approved by:	re (hrs)
MFC after:	1 minute

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