PatR e0867661b4 Unix: fix 'nethack -u name' ...

Using '-u name' rather than '-uname' was being treated as '--usage'
for any value of 'name'.

'-uname' worked as intended unless name was 'sage' (or leading
substring of it).  That's still the case after this fix, where the
space after -u is now necessary for that special case name.

2022-11-22 14:53:43 -08:00

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