#10 make fails under nonNT windows OS

[Ed Manlove]

Under non NT windows OS the attempt to correctly
detect the OSTYPE fails. I am running cygwin version
1.3.10 under Windows 98. The uname command returns
CYGWIN_98-4.10 which is not one of the strings listed
in the check for windows OS/cygwin. There has to be a
better way to do this. I am looking for other cygwin
shell commands that would provided better info than
uname or possible finding another way around this
issue altogether. For example just define OSTYPE!

[Paolo Masetti]

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I think that searching CYGWIN inside OSTYPE could be
accepted as generic CYGWIN platform.
I'll modify makefiles to support this type of detection.
I only have to test it against B-20.