By default, PS doesn't have very many tools for dealing with ban
evaders on proxies - most of the main server's protection is in private
code.
This commit adds a basic IP evaluator to PS. It categorizes IPs into
residential, mobile, and proxy (and a few other determinations), and
locks proxy IPs by default. DNSBL entries remain semilocked.
This behavior can, as always, be customized via hostfilter. Detect
`user.locked === '#hostfilter'` for the proxy IP lock, which you can
just set `user.locked = null` to disable.
Fixes#5239
This is mostly a TypeScript refactor, but it does come with several
renames:
Dnsbl -> IPTools
Dnsbl.query -> IPTools.queryDnsbl
Dnsbl.reverse -> IPTools.getHost
