0.9.16.29:

0.9.16.29:
        The new timer.impure test added in 0.9.16.21 uncovered some
        completely unrelated problems in a different test. Multiple
        simultaneous FIND-SYMBOLs on the same package could cause the
        package to become corrupted in a way that would cause further
        accesses to it to loop infinitely. This seems a bit harsh.

	* Remove the optimization (moving the table from which a
          symbol was found to the front of the package's table list)
          which was causing this problem. It didn't seem to have much
          of an performance effect anyway.
        * Fix the test that was accidentally triggering this bug and
          add a new test specifically for it.