Stream: increase default value for proxy_protocol_timeout to 30s.

src/stream/ngx_stream_core_module.c

diff --git a/src/stream/ngx_stream_core_module.c b/src/stream/ngx_stream_core_module.c
index 23f1e85..1c808ad 100644
--- a/src/stream/ngx_stream_core_module.c
+++ b/src/stream/ngx_stream_core_module.c
@@ -249,7 +249,7 @@
     }
 
     ngx_conf_merge_msec_value(conf->proxy_protocol_timeout,
-                              prev->proxy_protocol_timeout, 5000);
+                              prev->proxy_protocol_timeout, 30000);
 
     ngx_conf_merge_value(conf->tcp_nodelay, prev->tcp_nodelay, 1);