Hi!

The attached patch converts the existing "bool" implementation to a C99
equivalent. Either by using <stdbool.h> or by #define'ing and
typedef'ing the same according to http://en.wikipedia.org/wiki/Stdbool.h
(at least IMHO).
The main gain - apart from adhering to standards - is to save a few
bytes here and there.

That patch runs since weeks at my (Linux) node and worked on all tests
on Win32. So I assume it should also work on *BSD.

I have no problem to push it into whatever repo but I fear it may be too
risky in general.

	Bernd
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