Added intern which functions to benchmarks

Docs/manual.texi:
  Update about benchmarks
mysql-test/mysql-test-run.sh:
  Added intern which functions

Docs/manual.texi

@@ -28293,6 +28293,10 @@ If you connect using TCP/IP rather than Unix sockets, the result is 7.5%
 slower on the same computer. (If you are connection to @code{localhost},
 @strong{MySQL} will, by default, use sockets).
 
+@item
+If you connect using TCP/IP from another computer over a 100M Ethernet,
+things will be 8-11 % slower.
+
 @item
 If you compile with @code{--with-debug=full}, then you will loose 20 %
 for most queries, but some queries may take substantially longer (The

mysql-test/mysql-test-run.sh

@@ -20,6 +20,27 @@ TZ=GMT-3; export TZ # for UNIX_TIMESTAMP tests to work
 
 PATH=/bin:/usr/bin:/usr/local/bin:/usr/bsd:/usr/X11R6/bin
 
+# Standard functions
+
+which ()
+{
+  DIRS=`echo $PATH | tr ":" " "`
+  for file
+  do
+    for dir in $DIRS
+    do
+      if test -f $dir/$file
+      then
+        echo "$dir/$file"
+        continue 2
+      fi
+    done
+    echo "which: no $file in ($PATH)"
+    exit 1
+  done
+}
+
+
 # No paths below as we can't be sure where the program is!
 
 BASENAME=`which basename | head -1`