Test that the server correctly reports missing certificate errors,
rejects invalid hostnames, fails gracefully on port conflicts, and
starts successfully with multiple virtual hosts configured.
- Remove custom logging module and init_logging function
- Update main.rs to use tracing_subscriber with EnvFilter
- Remove log_level from global config structure
- Update documentation and tests to use RUST_LOG
- Format long lines in config.rs and test files for better readability
- Add hostname-based request routing for multiple capsules per server
- Parse virtual host configs from TOML sections ([hostname])
- Implement per-host certificate and content isolation
- Add comprehensive virtual host testing and validation
- Update docs and examples for multi-host deployments
This enables Pollux to serve multiple Gemini domains from one instance,
providing the foundation for multi-tenant Gemini hosting.
