Merge kahlann.erinye.com:/home/df/mysql/build/mysql-5.0-build-work

into  kahlann.erinye.com:/home/df/mysql/build/mysql-5.1-build

mysql-test/mysql-test-run.pl

@@ -786,6 +786,9 @@ sub command_line_setup () {
     {
       # Only platforms that have native symlinks can use the vardir trick
       $opt_mem= $opt_vardir;
+      # Delete the default directory in case it exists since we're going to create
+      # a new one later anyway, and the mkpath below throws a fatal error otherwise
+      eval { rmtree($default_vardir, 1, 1); };
       mtr_report("Using 4.1 vardir trick");
     }