Clarify setting useragent to empty string

[mdref/mdref-http] / http / Client / Curl.md

diff --git a/http/Client/Curl.md b/http/Client/Curl.md
index efd8d96f1eef0367caaf7072518444e71bb872b6..afc578ce55912138ac426e796142ec8d83843560 100644 (file)
--- a/http/Client/Curl.md
+++ b/http/Client/Curl.md
@@ -209,7 +209,7 @@ The option names used here are more or less derived from the corresponding CURLO
 * bool $autoreferer  
   Whether to automatically send referers.
 * string $useragent  
-  Custom User-Agent header.
+  Custom User-Agent header. Setting this option to NULL will use the default user agent, use the empty string to prevent this header being sent at all.
 * string $etag  
   Custom ETag.
 * bool $compress