Regen most of the config output. With support for alternating ports the
moment when the default listeners are added to the config got moved into
parse_config() and so is now visible in the printed co

Regen most of the config output. With support for alternating ports the
moment when the default listeners are added to the config got moved into
parse_config() and so is now visible in the printed config. Showing the
listen on statements is probably a good thing.
Failure noticed by anton@

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The Adj-RIB-Out is gone (or actually implemented differently). Adjust
the expected output files.

Adjust config output since holdtime min and fib-priority are no longer
printed if they are the default.

Add some more prefix-set test cases. Mainly to test edge cases in the RB
tree implementation now used.

Sort order changed because an RB tree is now used for prefixsets.

Adjust after introduction of maxlen

update regression tests after previous commit. ok claudio@

Enable the empty as-set and prefix-set tests since that is now allowed again

Comment the empty as-set and prefix-set tests. This is not yet working.
Add a single asnum test, just to make sure that works as well

Enable all the #notyet tests since the parser supports those now

prefix-set printing was adjusted in last commit. Adjust test.

Fixup regress test after the last burst of commits by benno@

Regress tests for as-set and prefix-set blocks