mysql-test-run.sh don't depend on 'tr'

mysql-test/mysql-test-run.sh:
  use IFS=: instead of tr : " "
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

BitKeeper/etc/logging_ok

-heikki@donna.mysql.fi
-monty@donna.mysql.fi
-sasha@mysql.sashanet.com
+tim@threads.polyesthetic.msg

mysql-test/mysql-test-run.sh

@@ -24,10 +24,10 @@ PATH=/bin:/usr/bin:/usr/local/bin:/usr/bsd:/usr/X11R6/bin
 
 which ()
 {
-  DIRS=`echo $PATH | tr ":" " "`
+  IFS="${IFS=   }"; save_ifs="$IFS"; IFS=':'
   for file
   do
-    for dir in $DIRS
+    for dir in $PATH
     do
       if test -f $dir/$file
       then
@@ -38,6 +38,7 @@ which ()
     echo "which: no $file in ($PATH)"
     exit 1
   done
+  IFS="$save_ifs"
 }