SPDY: fixed reversed priority order in window waiting queue.

src/http/ngx_http_spdy.h

diff --git a/src/http/ngx_http_spdy.h b/src/http/ngx_http_spdy.h
index b98b4d8..55aceda 100644
--- a/src/http/ngx_http_spdy.h
+++ b/src/http/ngx_http_spdy.h
@@ -174,6 +174,9 @@
 
     for (out = &sc->last_out; *out; out = &(*out)->next)
     {
+        /*
+         * NB: higher values represent lower priorities.
+         */
         if (frame->priority >= (*out)->priority) {
             break;
         }

src/http/ngx_http_spdy_filter_module.c

diff --git a/src/http/ngx_http_spdy_filter_module.c b/src/http/ngx_http_spdy_filter_module.c
index 8a3f0a3..92c7602 100644
--- a/src/http/ngx_http_spdy_filter_module.c
+++ b/src/http/ngx_http_spdy_filter_module.c
@@ -967,7 +967,10 @@
     {
         s = ngx_queue_data(q, ngx_http_spdy_stream_t, queue);
 
-        if (s->priority >= stream->priority) {
+        /*
+         * NB: higher values represent lower priorities.
+         */
+        if (stream->priority >= s->priority) {
             break;
         }
     }