From cdb630655db39ff1a319ace871e75389072deeb9 Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Tue, 16 Feb 2021 10:19:37 +0000
Subject: [PATCH] http: do not add a referrer header with empty value

Previously an empty 'Referer:' header was added to the HTTP request when
passing `--referer ';auto'` or `--referer ''` on the command-line. This
patch makes `--referer` work like `--header 'Referer:'` and will only add
the header if it has a non-zero length value.

Reviewed-by: Jay Satiro
Closes #6610
---
 src/tool_getparam.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/tool_getparam.c b/src/tool_getparam.c
index d337251f9..5b155cf00 100644
--- a/src/tool_getparam.c
+++ b/src/tool_getparam.c
@@ -1547,7 +1547,8 @@ ParameterError getparameter(const char *flag, /* f or -long-flag */
       }
       else
         config->autoreferer = FALSE;
-      GetStr(&config->referer, nextarg);
+      ptr = *nextarg ? nextarg : NULL;
+      GetStr(&config->referer, ptr);
     }
     break;
     case 'E':