modified detection

• 502066tenable_ot_mikrotik_CVE-2018-14847.nasl • 1.2
• 501924tenable_ot_dell_CVE-2018-15776.nasl • 1.2
• 500340tenable_ot_yokogawa_CVE-2018-0651.nasl • 1.8
• 500066tenable_ot_mitsubishi_CVE-2019-6535.nasl • 1.9
• 500838tenable_ot_siemens_CVE-2019-6110.nasl • 1.7
• 500115tenable_ot_yokogawa_CVE-2018-16196.nasl • 1.9
• 501509tenable_ot_moxa_CVE-2019-6518.nasl • 1.6
• 500841tenable_ot_siemens_CVE-2019-6109.nasl • 1.6
• 500226tenable_ot_siemens_CVE-2018-13798.nasl • 1.8
• 500898tenable_ot_siemens_CVE-2019-6111.nasl • 1.6
• 500840tenable_ot_siemens_CVE-2018-20685.nasl • 1.6
• 500868tenable_ot_schneider_CVE-2019-10953.nasl • 1.6
• 501068tenable_ot_abb_CVE-2018-17926.nasl • 1.6
• 501915tenable_ot_dell_CVE-2019-3705.nasl • 1.2
• 501529tenable_ot_moxa_CVE-2020-6987.nasl • 1.3
• 501560tenable_ot_moxa_CVE-2020-6991.nasl • 1.6
• 501567tenable_ot_moxa_CVE-2020-6989.nasl • 1.3