[98c8b3ec12] Use constraint to work around failing test; it's just a bug in the
underlying library, and one that appears fixed in later versions. Not our fault
if some OSes don't update. (It's also in a very esoteric spot.)
Even though TCLOO_PATCHLEVEL is equal to TCLOO_VERSION, using "patchlevel" is more appropriate in those two places.
Allow loading of pkgooa.so in Tcl 8.5 for (regression) test purposed. 
Better error messages in stead of crashes in some (hypothetical) error situations.
merge trunk