add htt.hls sample

+# the config for srs to delivery hls
+# @see https://github.com/winlinvip/simple-rtmp-server/wiki/SampleHLS
+# @see full.conf for detail config.
+
+listen              1935;
+http_stream {
+    enabled         on;
+    listen          8080;
+    dir             ./objs/nginx/html;
+}
+vhost __defaultVhost__ {
+    hls {
+        enabled         on;
+        hls_path        ./objs/nginx/html;
+        hls_fragment    10;
+        hls_window      60;
+    }
+}