--- a/xml/en/docs/http/ngx_http_upstream_module.xml	Tue Dec 05 16:54:22 2017 +0300
+++ b/xml/en/docs/http/ngx_http_upstream_module.xml	Mon Dec 11 12:13:09 2017 +0300
@@ -10,7 +10,7 @@
 <module name="Module ngx_http_upstream_module"
         link="/en/docs/http/ngx_http_upstream_module.html"
         lang="en"
-        rev="65">
+        rev="66">
 
 <section id="summary">
 
@@ -332,6 +332,20 @@
 </note>
 </tag-desc>
 
+<tag-name id="drain">
+<literal>drain</literal>
+</tag-name>
+<tag-desc>
+puts the server into the “draining” mode (1.13.6).
+In this mode, only requests <link id="sticky">bound</link> to the server
+will be proxied to it.
+<note>
+Prior to version 1.13.6,
+the parameter could be changed only with the
+<link doc="ngx_http_api_module.xml">API</link> module.
+</note>
+</tag-desc>
+
 </list>
 </para>