Add a list of forbidden or reserved merchant ids
Add a list of forbidden or reserved merchant ids

Sources:
- Reserved subdomains (https://github.com/jedireza/reserved-subdomains)
- Bad words (https://github.com/LDNOOBW/List-of-Dirty-Naughty-Obscene-and-Otherwise-Bad-Words)
- Fortune 1000 and Top 200 coin names
- Internal branding

cardstack/cardstack,cardstack/cardstack,cardstack/cardstack,cardstack/cardstack,cardstack/cardstack,cardstack/cardstack