issue major#300 Performance schema shouldn t be installed on 5.5 version.

Author: jmrenouard

mysqltuner.pl

@@ -3323,7 +3323,7 @@ sub mysqsl_pfs {
  unless defined( $myvar{'performance_schema'} );
  unless ( $myvar{'performance_schema'} eq 'ON' ) {
  infoprint "Performance schema is disabled.";
- if ( mysql_version_ge( 5, 5 ) ) {
+ if ( mysql_version_ge( 5, 6 ) ) {
  push( @generalrec,
  "Performance should be activated for better diagnostics" );
  push( @adjvars, "performance_schema = ON enable PFS" );