[Extension] sva_ext_ban_for_email

https://github.com/MioVisman/punbb_exte … _for_email

Extended ban for email.

Administration -> Settings -> Registration -> Allow registration with banned email addresses = OFF

Examples:
ban = exemple.com -> stop: user.name@exemple.com, user.name@www.exemple.com;
ban = .org -> stop: all .org domains;
ban - user.name@gmail.com -> stop: username@gmail.com, u.s.e.r.n.a.m.e+tag@gmail.com.