B19; supporting a DOS-path such as C:\a\b\c;C:\d\e\f;D:\g\h

[chris at godzilla dot activesw dot com (Chris Callsen)]

Cygnus Folks,

Let me first say that I like using bash on windows (cmd.exe makes me
insane). Naturally, bash uses a Unix-style PATH for finding things.
However, when bash runs "native" Windows applications these see a
Unix-style PATH but expect a DOS style path. An example of this would be
'nmake', or the Microsoft Tools (C compiler, linker, etc).

After checking the sourcecode, it seems as if src/bash/general.c lines
881 & 883 is where the magic happens (i.e., splitting on ':'). What
about allowing an environment variable that controls what character is
used to split the PATH?

A question at hand is if the implementation of "open" and friends in
cygwin32.dll understand DOS-style paths - but they might do that, so it
should work.

Any feedback on this one?

-Christian Callsen
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