K 10 svn:author V 5 dyson K 8 svn:date V 27 1996-03-09T07:01:21.000000Z K 7 svn:log V 254 Correct some new and older lurking bugs. Hold count wasn't being handled correctly. Fix some incorrect code that was included to improve performance. Significantly simplify the pmap_use_pt and pmap_unuse_pt subroutines. Add some more diagnostic code. END