Documentation:  Add target=_blank to some URLs so they can be opened from DocuWiki.  Some Sourceforge content cannot be served in a frame

Lincoln60: Add a thttpd-binfs configuration.  That configuration still does not work on initial commit

Add simulator configuration for testing the Union Fs.  Fix a few bugs.  Almost works but still too flaky

Add support for a union file system that can be used to overlay and merge the content of two mounted file systems.