- [x] server
  - [x] TLS configuration from cert+key files
- [x] client
  - [ ] follow redirects
- [ ] reject non-gemini requests
- [x] contrib - filesystem handling
  - [x] serving files
  - [x] directory index files
  - [x] directory listing
- [ ] filtering middleware
- [x] contrib - request logging
- [x] contrib - CGI
- [ ] contrib - shared hosting helper
- [ ] contrib - TLS auth