make nrelease: get rid of cvsup; we no longer depend on it

[Sascha Wildner]

YONETANI Tomokazu schrieb:
For that matter, pkgsrc/net/csup, which is 250K in size, is more harmless
in that it won't install files in an odd location now that we're accustomed
to use pkgsrc (I forgot removing the part populating /usr/local in the
previous patch, BTW), yet it does almost the same job as cvsup program
(last time I checked, the expansion of some less popular keywords, $Log for
one, didn't work correctly).
Last time I looked, csup (the one from pkgsrc at least) supported only 
checkout mode, but not CVS mode (contrary to what someone wrote in this 
thread).

Sascha

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