performance model:	generalizations to NIC/HBA simulation
	now includes fixed and per-byte costs
	refactored parameters to facilitate sub-classing
	added a full set of parameters for HBAs as well as NICs

Signed-off-by: Mark Kampe <mark.kampe@gmail.com>
performance model: improved reporting for Server simulation
	report any pass-through resource that caps throughput
	report any pass-through resource with utilization > threshold
	report any queueing delays that impact latency
Server performance model: message cleanup
	ensure all warnings identify limiting resource in "Server"
Performance model: improvements to Gateway reporting
	add support for reporting queueing delays
	detect and report throughput limiting resources
	report on pass-through resources loaded above a threshold level