Merge branch '6421-update-appmonitor-checks' into 'master'

public_html/appmonitor/classes/appmonitor-checks.class.php

public_html/appmonitor/classes/appmonitor-client.class.php

public_html/appmonitor/git_update_appmonitor.sh

...ic_html/appmonitor/plugins/apps/iml-appmonitor-server.php

public_html/appmonitor/plugins/apps/shared_check_ssl.php

public_html/appmonitor/plugins/checks/apacheprocesses.php

public_html/appmonitor/plugins/checks/cert.php

public_html/appmonitor/plugins/checks/diskfree.php

public_html/appmonitor/plugins/checks/exec.php

public_html/appmonitor/plugins/checks/file.php

public_html/appmonitor/plugins/checks/hello.php

public_html/appmonitor/plugins/checks/httpcontent.php

public_html/appmonitor/plugins/checks/loadmeter.php

public_html/appmonitor/plugins/checks/mysqlconnect.php

public_html/appmonitor/plugins/checks/pdoconnect.php

public_html/appmonitor/plugins/checks/phpmodules.php

public_html/appmonitor/plugins/checks/ping.php

public_html/appmonitor/plugins/checks/porttcp.php

public_html/appmonitor/plugins/checks/simple.php

public_html/appmonitor/plugins/checks/sqliteconnect.php