selfhtml.js, selfxhtml.js and svgunit.js contained similar flaws in the
implementation of "load" which causes load to always return the value of
document.  The intent was that subsequent calls to load would return
document.clone().  function load did not call builder.load and builder.load had
its own flaw.

getElementsByTagNameNS01 and 08 would fail in the SVG self-hosted tests since
the test initialization would add an element to place the name of the test in
the drawing before running the test.  The change in the number of elements
present in the document would cause the test to fail.  svgunit.js has been
changed so that the label is added after the test is run.

implementation.xhtml referenced selfhtml.js instead of selfxhtml.js.