underscores_in_headers

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 6c0e28a..d8392ee 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1214,7 +1214,7 @@
 
     for ( ;; ) {
 
-        rc = ngx_http_parse_header_line(r, &r->upstream->buffer);
+        rc = ngx_http_parse_header_line(r, &r->upstream->buffer, 1);
 
         if (rc == NGX_OK) {