fix #222, the dvr path rule changed.

 # the config for srs to dvr in segment mode
-# @see https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_DVR
+# @see https://github.com/winlinvip/simple-rtmp-server/wiki/v2_CN_DVR
 # @see full.conf for detail config.
 
 listen              1935;
@@ -7,7 +7,7 @@ max_connections     1000;
 vhost __defaultVhost__ {
     dvr {
         enabled      on;
-        dvr_path     ./objs/nginx/html;
+        dvr_path     ./objs/nginx/html/[app]/[stream].[timestamp].flv;
         dvr_plan     segment;
         dvr_duration    30;
         dvr_wait_keyframe       on;

 # the config for srs to dvr in session mode
-# @see https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_DVR
+# @see https://github.com/winlinvip/simple-rtmp-server/wiki/v2_CN_DVR
 # @see full.conf for detail config.
 
 listen              1935;
@@ -7,7 +7,7 @@ max_connections     1000;
 vhost __defaultVhost__ {
     dvr {
         enabled      on;
-        dvr_path     ./objs/nginx/html;
+        dvr_path     dvr_path     ./objs/nginx/html/[app]/[stream].[timestamp].flv;
         dvr_plan     session;
     }
 }

@@ -326,8 +326,8 @@ vhost dvr.srs.com {
         # @see https://github.com/winlinvip/simple-rtmp-server/wiki/v2_CN_DVR#custom-path
         # @see https://github.com/winlinvip/simple-rtmp-server/wiki/v2_EN_DVR#custom-path
         #       segment,session apply it.
-        # default: ./objs/nginx/html
-        dvr_path        ./objs/nginx/html;
+        # default: ./objs/nginx/html/[app]/[stream].[timestamp].flv
+        dvr_path        ./objs/nginx/html/[app]/[stream].[timestamp].flv;
         # the duration for dvr file, reap if exeed, in seconds.
         #       segment apply it.
         #       session,append ignore.

@@ -58,7 +58,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define SRS_CONF_DEFAULT_HLS_MOUNT "[vhost]/[app]/[stream].m3u8"
 #define SRS_CONF_DEFAULT_HLS_ACODEC "aac"
 #define SRS_CONF_DEFAULT_HLS_VCODEC "h264"
-#define SRS_CONF_DEFAULT_DVR_PATH "./objs/nginx/html"
+#define SRS_CONF_DEFAULT_DVR_PATH "./objs/nginx/html/[app]/[stream].[timestamp].flv"
 #define SRS_CONF_DEFAULT_DVR_PLAN_SESSION "session"
 #define SRS_CONF_DEFAULT_DVR_PLAN_SEGMENT "segment"
 #define SRS_CONF_DEFAULT_DVR_PLAN_APPEND "append"