Proxy: logging levels tuned, double logging fixed.

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 78e2765..a8bbff6 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1559,7 +1559,7 @@
         r = p->input_ctx;
         p->upstream_done = 1;
 
-        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+        ngx_log_error(NGX_LOG_WARN, r->connection->log, 0,
                       "upstream sent too many data");
     }
 
@@ -1817,9 +1817,6 @@
 
 invalid:
 
-    ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
-                  "upstream sent invalid chunked response");
-
     return NGX_ERROR;
 }
 
@@ -1933,7 +1930,7 @@
 
         /* invalid response */
 
-        ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
+        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                       "upstream sent invalid chunked response");
 
         return NGX_ERROR;
@@ -2089,7 +2086,7 @@
 
         /* invalid response */
 
-        ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
+        ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                       "upstream sent invalid chunked response");
 
         return NGX_ERROR;