Set default valgrind options to "-v --show-reachable=yes" and make it possible...

Set default valgrind options to "-v --show-reachable=yes" and make it possible to override that with --valgrind-options 


mysql-test/mysql-test-run.pl:
  Make --valgrind-all a synonym for --valgrind.
  Set "-v --show-reachable=yes" as our default valgrind options. 
  Make --valgrind-options override the default options
  Update usage.
  Turn on valgrinding also when user specified --valgrind-path or --valgrind-options without --valgrind

mysql-test/mysql-test-run.pl

@@ -286,7 +286,7 @@ our $opt_user_test;
 our $opt_valgrind= 0;
 our $opt_valgrind_mysqld= 0;
 our $opt_valgrind_mysqltest= 0;
-our $opt_valgrind_all= 0;
+our $default_valgrind_options= "-v --show-reachable=yes";
 our $opt_valgrind_options;
 our $opt_valgrind_path;
 
@@ -597,10 +597,9 @@ sub command_line_setup () {
              # Coverage, profiling etc
              'gcov'                     => \$opt_gcov,
              'gprof'                    => \$opt_gprof,
-             'valgrind'                 => \$opt_valgrind,
+             'valgrind|valgrind-all'    => \$opt_valgrind,
              'valgrind-mysqltest'       => \$opt_valgrind_mysqltest,
              'valgrind-mysqld'          => \$opt_valgrind_mysqld,
-             'valgrind-all'             => \$opt_valgrind_all,
              'valgrind-options=s'       => \$opt_valgrind_options,
              'valgrind-path=s'          => \$opt_valgrind_path,
 
@@ -807,20 +806,32 @@ sub command_line_setup () {
     $opt_with_ndbcluster= 0;
   }
 
-  # Turn on valgrinding of all executables if "valgrind" or "valgrind-all"
-  if ( $opt_valgrind or $opt_valgrind_all )
+  # Check valgrind arguments
+  if ( $opt_valgrind or $opt_valgrind_path or defined $opt_valgrind_options)
   {
     mtr_report("Turning on valgrind for all executables");
     $opt_valgrind= 1;
     $opt_valgrind_mysqld= 1;
     $opt_valgrind_mysqltest= 1;
   }
-  elsif ( $opt_valgrind_mysqld or $opt_valgrind_mysqltest )
+  elsif ( $opt_valgrind_mysqld )
   {
-    # If test's are run for a specific executable, turn on
-    # verbose and show-reachable
+    mtr_report("Turning on valgrind for mysqld(s) only");
     $opt_valgrind= 1;
-    $opt_valgrind_all= 1;
+  }
+  elsif ( $opt_valgrind_mysqltest )
+  {
+    mtr_report("Turning on valgrind for mysqltest only");
+    $opt_valgrind= 1;
+  }
+
+  if ( $opt_valgrind )
+  {
+    # Set valgrind_options to default unless already defined
+    $opt_valgrind_options=$default_valgrind_options
+      unless defined $opt_valgrind_options;
+
+    mtr_report("Running valgrind with options \"$opt_valgrind_options\"");
   }
 
   if ( ! $opt_testcase_timeout )
@@ -3409,17 +3420,8 @@ sub valgrind_arguments {
   mtr_add_arg($args, "--suppressions=%s/valgrind.supp", $glob_mysql_test_dir)
     if -f "$glob_mysql_test_dir/valgrind.supp";
 
-  if ( $opt_valgrind_all )
-  {
-    mtr_add_arg($args, "-v");
-    mtr_add_arg($args, "--show-reachable=yes");
-  }
-
-  if ( $opt_valgrind_options )
-  {
+  # Add valgrind options, can be overriden by user
   mtr_add_arg($args, '%s', $_) for (split(' ', $opt_valgrind_options));
-  }
-
 
   mtr_add_arg($args, $$exe);
 
@@ -3519,12 +3521,12 @@ Options for coverage, profiling etc
 
   gcov                  FIXME
   gprof                 FIXME
-  valgrind              Run the "mysqltest" and "mysqld" executables using valgrind
-  valgrind-all          Same as "valgrind" but will also add "verbose" and "--show-reachable"
-                        flags to valgrind
+  valgrind              Run the "mysqltest" and "mysqld" executables using
+                        valgrind with options($default_valgrind_options)
+  valgrind-all          Synonym for --valgrind
   valgrind-mysqltest    Run the "mysqltest" executable with valgrind
   valgrind-mysqld       Run the "mysqld" executable with valgrind
-  valgrind-options=ARGS Extra options to give valgrind
+  valgrind-options=ARGS Options to give valgrind, replaces default options
   valgrind-path=[EXE]   Path to the valgrind executable
 
 Misc options