[mod-security-users] Enforce password complexity regex

[Russell R. <rus...@gm...>]

Ofer,

I can't take credit for this one. Thanks RegexBuddy library. This one
requires 8 length, one upper, one lower, and one number.

^(?=[a-zA-Z0-9]*?[A-Z])(?=[a-zA-Z0-9]*?[a-z])(?=[a-zA-Z0-9]*?[0-9])[a-zA-Z0-9]{8,}$

does modsec support the lookahead?