- Implement SIGHUP signal handler that triggers configuration reload
- Add reload_configuration() function to reload services config and password
- Reload password from config files when SIGHUP is received
- Reload services configuration from service files
- Update connect_to_server() to accept services parameters for reload functionality
- Add proper cleanup for services in main function

This allows wssshc to reload its configuration without restarting:
- Services configuration from /etc/wsssh.d/ directory
- Password from config files
- All changes take effect immediately without service interruption