[Distutils] Bug in parsing of .cfg files

[M.-A. Lemburg]

The following .cfg file produces an error:

[sdist]
manifest = MANIFEST
no-defaults = 1
keep-tree = 1
formats=bztar,gztar,tar,zip,ztar

...
error: error in setup.cfg: command 'sdist' has no such option 'keep-tree'

Looks as if the config file parser doesn't like options with
embedded hyphens (or maybe it's just me not knowing how to
pass the options ?).

-- 
Marc-Andre Lemburg
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