setenv memory leak fix (take 3)

[Andrey Chernov]

On Mon, Apr 30, 2007 at 09:04:46PM -0500, Sean C. Farley wrote:

>    2. http://www.farley.org/freebsd/tmp/setenv-8/POSIX/sysenv.c

putenv():
/* Create environment entry. */
	envVars[envNdx].name = string;
	envVars[envNdx].nameLen = nameLen;
	envVars[envNdx].value = equals + 1;
	envVars[envNdx].valueSize = valueLen;

It will not work that way. "string" is just passed buffer which can be 
altered any time until the next set|putenv call. It means that you can't 
assume "nameLen", "equals" position and "valueLen" will stay the same as 
at the moment of the call.

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