inherit proxy_pass, fastcgi_pass, uwsgi_pass, scgi_pass inside a limit_except block if no handler was defined for the block

diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index 872f518..8cc42e5 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c

@@ -2025,6 +2025,7 @@
     ngx_keyval_t                 *src;
     ngx_hash_key_t               *hk;
     ngx_hash_init_t               hash;
+    ngx_http_core_loc_conf_t     *clcf;
     ngx_http_script_compile_t     sc;
     ngx_http_script_copy_code_t  *copy;
 
@@ -2270,6 +2271,13 @@
         conf->fastcgi_values = prev->fastcgi_values;
     }
 
+    if (conf->upstream.upstream || conf->fastcgi_lengths) {
+        clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+        if (clcf->handler == NULL && clcf->lmt_excpt) {
+            clcf->handler = ngx_http_fastcgi_handler;
+        }
+    }
+
 #if (NGX_PCRE)
     if (conf->split_regex == NULL) {
         conf->split_regex = prev->split_regex;

diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index ba98456..caf27b6 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c

@@ -1720,6 +1720,7 @@
     size_t                      size;
     ngx_keyval_t               *s;
     ngx_hash_init_t             hash;
+    ngx_http_core_loc_conf_t   *clcf;
     ngx_http_proxy_redirect_t  *pr;
     ngx_http_script_compile_t   sc;
 
@@ -2022,6 +2023,13 @@
         conf->vars = prev->vars;
     }
 
+    if (conf->upstream.upstream || conf->proxy_lengths) {
+        clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+        if (clcf->handler == NULL && clcf->lmt_excpt) {
+            clcf->handler = ngx_http_proxy_handler;
+            conf->location = prev->location;
+        }
+    }
 
     if (conf->body_source.data == NULL) {
         conf->body_source = prev->body_source;

diff --git a/src/http/modules/ngx_http_scgi_module.c b/src/http/modules/ngx_http_scgi_module.c
index 515b4ae..d831e27 100644
--- a/src/http/modules/ngx_http_scgi_module.c
+++ b/src/http/modules/ngx_http_scgi_module.c

@@ -1053,6 +1053,7 @@
     ngx_keyval_t                 *src;
     ngx_hash_key_t               *hk;
     ngx_hash_init_t               hash;
+    ngx_http_core_loc_conf_t     *clcf;
     ngx_http_script_compile_t     sc;
     ngx_http_script_copy_code_t  *copy;
 
@@ -1285,6 +1286,13 @@
         conf->scgi_values = prev->scgi_values;
     }
 
+    if (conf->upstream.upstream || conf->scgi_lengths) {
+        clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+        if (clcf->handler == NULL && clcf->lmt_excpt) {
+            clcf->handler = ngx_http_scgi_handler;
+        }
+    }
+
     if (conf->params_source == NULL) {
         conf->flushes = prev->flushes;
         conf->params_len = prev->params_len;

diff --git a/src/http/modules/ngx_http_uwsgi_module.c b/src/http/modules/ngx_http_uwsgi_module.c
index 7899d97..a252913 100644
--- a/src/http/modules/ngx_http_uwsgi_module.c
+++ b/src/http/modules/ngx_http_uwsgi_module.c

@@ -1106,6 +1106,7 @@
     ngx_keyval_t                 *src;
     ngx_hash_key_t               *hk;
     ngx_hash_init_t               hash;
+    ngx_http_core_loc_conf_t     *clcf;
     ngx_http_script_compile_t     sc;
     ngx_http_script_copy_code_t  *copy;
 
@@ -1340,6 +1341,13 @@
         conf->uwsgi_values = prev->uwsgi_values;
     }
 
+    if (conf->upstream.upstream || conf->uwsgi_lengths) {
+        clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+        if (clcf->handler == NULL && clcf->lmt_excpt) {
+            clcf->handler = ngx_http_uwsgi_handler;
+        }
+    }
+
     ngx_conf_merge_uint_value(conf->modifier1, prev->modifier1, 0);
     ngx_conf_merge_uint_value(conf->modifier2, prev->modifier2, 0);
 

diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 356e648..6a11a87 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c

@@ -3908,6 +3908,7 @@
     clcf->loc_conf = ctx->loc_conf;
     clcf->name = pclcf->name;
     clcf->noname = 1;
+    clcf->lmt_excpt = 1;
 
     if (ngx_http_add_location(cf, &pclcf->locations, clcf) != NGX_OK) {
         return NGX_CONF_ERROR;

diff --git a/src/http/ngx_http_core_module.h b/src/http/ngx_http_core_module.h
index 82c1208..f163e9a 100644
--- a/src/http/ngx_http_core_module.h
+++ b/src/http/ngx_http_core_module.h

@@ -286,6 +286,7 @@
 #endif
 
     unsigned      noname:1;   /* "if () {}" block or limit_except */
+    unsigned      lmt_excpt:1;
     unsigned      named:1;
 
     unsigned      exact_match:1;