Already existing regex validation will be used on url after removing @ (in case
its in separating userinfo and host).
Signed-off-by: Matej Dujava <mdujava@kocurkovo.cz>
Fixes: https://github.com/pi-hole/pi-hole/issues/3911
Fixes: 7d19ee1b
: validate blocklist URL before adding to the database (#3237)