Rename CVSNT "mergepoints" test and make it executable. - rename test-convert-cvs-builtincvsps-cvsnt-mergepoints (and related files) to test-convert-cvsnt-mergepoints - this ensures that the test will be run, but does NOT make it pass: in particularly, it fails regularly for me due to the inconsistent behaviour of CVS itself - expect "Branchpoints:" in debugcvsps output

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created new head

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digraph G {

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	-1 -> 0

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	0 -> 1

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	0 -> 2

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	2 -> 3

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	1 -> 3

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}