如果监听 [::]:443; 启动nginx貌似会提示IP被占用。
nginx: [emerg] bind() to [2605:6400:2:xxx:xx:xxx:xx:2]:443 failed (98: Address already in use)
nginx: [emerg] bind() to [2605:6400:2:xxx:xx:xxx:xx:2]:443 failed (98: Address already in use)
nginx: [emerg] bind() to [2605:6400:2:xxx:xx:xxx:xx:2]:443 failed (98: Address already in use)
nginx: [emerg] bind() to [2605:6400:2:xxx:xx:xxx:xx:2]:443 failed (98: Address already in use)
nginx: [emerg] bind() to [2605:6400:2:xxx:xx:xxx:xx:2]:443 failed (98: Address already in use)
nginx: [emerg] still could not bind()