modified detection

• 198560redhat_unpatched_php-rhel4.nasl • 1.5
• 198485redhat_unpatched_php-rhel5.nasl • 1.7
• 198558redhat_unpatched_php-rhel6.nasl • 1.8
• 202270redhat_unpatched_php-rhel6_module.nasl • 1.5
• 198511redhat_unpatched_php-rhel7.nasl • 1.6
• 202267redhat_unpatched_php-rhel7_module.nasl • 1.5
• 198546redhat_unpatched_php-rhel8.nasl • 1.6
• 202269redhat_unpatched_php-rhel8_module.nasl • 1.5
• 198457redhat_unpatched_php-rhel9.nasl • 1.6