ngxtop fail to work with comment out log_format directive.

[yujinqiu]

use ngxtop -c conf/nginx.conf -l logs/access.log to specify the log_format. When nginx.conf with commented out log_format as following, I cann't not get the expected result.
# log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
log_format main '$remote_addr - $remote_user [$time_local] '
'"$request" $status $request_length $request_time $body_bytes_sent '
'"$http_referer" "$http_user_agent" $server_addr $upstream_addr $host $upstream_cache_status';

After I delete the commented lines, It works as expected.

[lebinh]

This is fixed which new config parser in development branch. I'll update ngxtop on pypi with new version soon.