Fixes issue in Nginx HLS Encryption Keys

[deamos]

This is a fix for the issue identified in the PR #1158 for arut/nginx-rtmp-module regarding HLS Encryption causing a hard crash with the below error which exists in nginx-http-flv-module.

nginx: [emerg] the same path name "/data/hlskeys" used in /usr/local/nginx/conf/nginx.conf:178 and in /usr/local/nginx/conf/nginx.conf:178

Commenting of line 2350 in hls/ngx_rtmp_hls_module.c corrects the problem and allows Nginx to start properly and use HLS encryption