Grab bag of little fixes and enhancements:
  * optional security enhancements
  * fix path coverage in MAINTAINERS
  * switch to using most used protocol and transport as default
  * clean up buffer dumps in trace code

Held off on RDMA patches as they need to be cleaned up a bit, but
will try to get the cleaned, checked, and pushed by mid-week.

(attempt 2, hopefully this one won't screw up the history)
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