methods in MetaCatServlet should be private not protected
Many of the helper methods in MetaCatServlet have been changed to "protected"
from their original "private" state. Most of these should be changed back to
"private" because they are not intended to be overridden by subclasses (for
example, handleGetOrPost). A couple should remain "protected", but only when
the method id specifically intended to be overridden (e.g., decodeMouseAction).