Fixed proxy_cache_use_stale in "no live upstreams" case.

src/http/modules/ngx_http_fastcgi_module.c

diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index f976b7a..4a62f71 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -2314,6 +2314,10 @@
                                          |NGX_HTTP_UPSTREAM_FT_OFF;
     }
 
+    if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_ERROR) {
+        conf->upstream.cache_use_stale |= NGX_HTTP_UPSTREAM_FT_NOLIVE;
+    }
+
     if (conf->upstream.cache_methods == 0) {
         conf->upstream.cache_methods = prev->upstream.cache_methods;
     }

src/http/modules/ngx_http_proxy_module.c

diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 5329351..b6aa38b 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -2685,17 +2685,21 @@
                               (NGX_CONF_BITMASK_SET
                                |NGX_HTTP_UPSTREAM_FT_OFF));
 
+    if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) {
+        conf->upstream.cache_use_stale = NGX_CONF_BITMASK_SET
+                                         |NGX_HTTP_UPSTREAM_FT_OFF;
+    }
+
+    if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_ERROR) {
+        conf->upstream.cache_use_stale |= NGX_HTTP_UPSTREAM_FT_NOLIVE;
+    }
+
     if (conf->upstream.cache_methods == 0) {
         conf->upstream.cache_methods = prev->upstream.cache_methods;
     }
 
     conf->upstream.cache_methods |= NGX_HTTP_GET|NGX_HTTP_HEAD;
 
-    if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) {
-        conf->upstream.cache_use_stale = NGX_CONF_BITMASK_SET
-                                         |NGX_HTTP_UPSTREAM_FT_OFF;
-    }
-
     ngx_conf_merge_ptr_value(conf->upstream.cache_bypass,
                              prev->upstream.cache_bypass, NULL);
 

src/http/modules/ngx_http_scgi_module.c

diff --git a/src/http/modules/ngx_http_scgi_module.c b/src/http/modules/ngx_http_scgi_module.c
index 9fd6014..2ab9ee8 100644
--- a/src/http/modules/ngx_http_scgi_module.c
+++ b/src/http/modules/ngx_http_scgi_module.c
@@ -1286,6 +1286,10 @@
                                          |NGX_HTTP_UPSTREAM_FT_OFF;
     }
 
+    if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_ERROR) {
+        conf->upstream.cache_use_stale |= NGX_HTTP_UPSTREAM_FT_NOLIVE;
+    }
+
     if (conf->upstream.cache_methods == 0) {
         conf->upstream.cache_methods = prev->upstream.cache_methods;
     }

src/http/modules/ngx_http_uwsgi_module.c

diff --git a/src/http/modules/ngx_http_uwsgi_module.c b/src/http/modules/ngx_http_uwsgi_module.c
index 86959b3..f28d9aa 100644
--- a/src/http/modules/ngx_http_uwsgi_module.c
+++ b/src/http/modules/ngx_http_uwsgi_module.c
@@ -1338,6 +1338,10 @@
                                          |NGX_HTTP_UPSTREAM_FT_OFF;
     }
 
+    if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_ERROR) {
+        conf->upstream.cache_use_stale |= NGX_HTTP_UPSTREAM_FT_NOLIVE;
+    }
+
     if (conf->upstream.cache_methods == 0) {
         conf->upstream.cache_methods = prev->upstream.cache_methods;
     }