Docs: updated changelog for some new settings.

There are eight new options made available under settings.http

  - header_buffer_size
  - large_header_buffer_size
  - large_header_buffers
  - proxy_buffer_size
  - proxy_header_buffer_size
  - proxy_timeout
  - proxy_send_timeout
  - proxy_read_timeout

Author: ac000

docs/changes.xml

@@ -43,6 +43,14 @@ supporting empty strings in the "location" option of the "return" action.
 </para>
 </change>
 
+<change type="feature">
+<para>
+new "header_buffer_size", "large_header_buffer_size", "large_header_buffers",
+"proxy_buffer_size", "proxy_header_buffer_size", "proxy_timeout",
+"proxy_send_timeout" and "proxy_read_timeout" "settings.http" options.
+</para>
+</change>
+
 <change type="feature">
 <para>
 variables support in the "location" option of the "return" action.