Add new bad words

[Zodiac1978]

We could add some more words to the Regex check:
https://github.com/pluginkollektiv/antivirus/blob/master/inc/class-antivirus-checkinternals.php#L154

Like functions for adding new administrators (as seen in a recent hack I cleaned up):

wp_create_user
set_role
username_exists
email_exists
add_cap
WP_User

Maybe more concrete, like set_role( 'administrator' )

[Zodiac1978]

Another one could be preventing to show errors:
error_reporting(0);

[Zodiac1978]

After reading the blog post, we could add visitorTracker_isMob to the list of bad words.

From #14

[Zodiac1978]

According to OWASP there are more filesystem function we could check for:
bzopen and gzopen and chgrp, chownand chmod

And some information disclosure functions like phpinfo, getenv, getmygid/pid/uid.

And for obfuscation functions like:
str_rot13