Add somewhat complex Emacs hack to deal with complexities of

Add somewhat complex Emacs hack to deal with complexities of
positioning windows.  Ignore non-synthetic reconfigure events when
interacting with a reparenting window manager.  Eliminate use of
deprecated size and position hints fields.  Improve X debugging
information.  Change default internal-border-width from 1 to 0.
Simplify method used to catch X errors.