[TCLCORE] changes for 8.5.8 releases

[Donald G P. <don...@ni...>]

I've updated the changes files for the Tcl/Tk 8.5.8 releases.  Please
examine and correct and fill in any missing bits.  Thanks!

-- 
| Don Porter          Mathematical and Computational Sciences Division |
| don...@ni...             Information Technology Laboratory |
| http://math.nist.gov/~DPorter/                                  NIST |
|______________________________________________________________________|