check_raid: Update to latest git version
check_ssl_cert: Update to 1.16.0
check_whois: Update to 1.15
check_httpd_status: Update to rev148
check_mongodb: Update copyright file

Include full copyright to make lintian happy.
check_mysql_health: Update copyright file

Add reference to GPL license file
check_hpasm: Update copyright file

Add reference to GPL license file
check_memory: Update copyright file

Update FSF address
check_rbl: Update copyright file

Cosmetical changes