1) Adding dragonfly adaptive and prog-adaptive routing algorithms--- still testing with more workloads and crosschecking the computation 2) Two bug fixes in credit-based flow control

Introduced back when I added a "last-hop" queue to allow prioritized
messages to go to the front of the set of msgs loggp is to receive. Haven't yet
put it in other models (simple*), so RNG bug doesn't affect there yet.

same var name used for the "sequencing" macros