Log Message:
Changes 8.4.7:
* Fixed [glob -path] bug when in the root directory
* Fixed unicode-char path installation on Windows NT-based platforms
* Properly subsitute more values in Windows tclConfig.sh
* Improved stack overflow prevention on Windows
* Fixed mem leak in [fconfigure $serial -xchar]
* Fixed crash with [cd] with a volumerelative $HOME
* Fixed clock %G %V formats for ISO8601 week numbers
* Fixed support for non-WIDE_INT aware math functions
* Added [http::config -urlencoding] option
* Fixed utf-8 encoding of \u0000 on system I/O
* Prevented dde hangs with non-responsive apps
* Added round() wide integer support
* Cleaner exit and correction of mem leaks when using the threaded
  memory allocator and reinitializing
* Improved build configuration on 64-bit systems
* Added read support of PPM/PGM with the -data option
* Correct issue with displaying maximize window button on KDE-3.2.1
* Fix drawing of unicode chars in menu titles on Windows
* Correctly post Tk clipboard data to the Windows clipboard on exit
* Fix the panedwindow -opaqueresize option to work as per the docs
* Reduce Tk tk_messageBox default font size to 14-point
* Prevent possible segfault in -maxundo
* Fix XIM initialization on Solaris
* Complete the implementation of the CG version of the X drawing
  emulation layer on Mac OS X
* Fix several Mac OS X usability issues