Regexp rule with $domain modifier doesn't work in 4.4 extension when the length of a domain is specified

[alexx7311]

Steps to reproduce:

1. Disable all filters
2. Go to User rules and add [$domain=/^webteizle\d{0,2}\.info/]##body
3. Open the filtering log on a new page and go to https://webteizle.info/izle/altyazi/justice-league-crisis-on-infinite-earths-part-one-w1

The rule should work on webteizle.info.