Case insensitive match when blocking user agents

[silv3rm00n]

When blocking by user agent, it would be ideal to do case insensitive match, or may be add an option to select case insensitive match in admin panel.

So if I specify "AskBot" in the user agent list, it should block "askbot" "askBot" "askBOT" all of them.

For now, I modified the code,
function preg_match_wildcard($regex, $subject) {
$regex = preg_quote($regex, '#');
$regex = str_replace('*', '.*', $regex);
if(preg_match("#^$regex$#i", $subject)) {
return true;
} else {
return false;
}
}

The call to preg_match has a "i" modifier attached to it.

[lesterchan]

sent a Pull Request? I will merge it. I think it makes sense to have case insensitive match.