PHP 7 compatibility check

Hi!

I’ve tested all my plugins with this PHP linter:
https://www.ads-software.com/plugins/php-compatibility-checker/

Unfortunately I found a problem with your plugin:

FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.client.php
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FOUND 1 ERROR AFFECTING 1 LINE
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71 | ERROR | Use of deprecated PHP4 style class constructor is not supported since PHP 7
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.de.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.idna.php
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FOUND 1 ERROR AFFECTING 1 LINE
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94 | ERROR | Use of deprecated PHP4 style class constructor is not supported since PHP 7
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.ip.lib.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.ip.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.main.php
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FOUND 1 ERROR AND 1 WARNING AFFECTING 2 LINES
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1 | WARNING | File has mixed line endings; this may cause incorrect results
51 | ERROR | Use of deprecated PHP4 style class constructor is not supported since PHP 7
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.mobi.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.nl.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.nz.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.org.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.parser.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.servers.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.si.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /plugins/all-in-one-wp-security-and-firewall/lib/whois/whois.utils.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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Would be great if you can fix this!

All the best and thx for your great plugin,
4ud