reductions: 'os.tmpname' may go.

[Asko Kauppi <asko.kauppi@...>]

It's causing compiler problems, and whatever, and is a perfect target 
for cleanup. :)

If not, at least make it so that it won't appear on the "os." 
namespace, unless really usable:

	#ifdef USE_TMPNAME==1   //AK
	  {"tmpname",   io_tmpname},
	#endif

Just my wish.. 	-ak