add UPGRADING note for PHP_FCGI_CHILDREN on Windows

diff --git a/UPGRADING b/UPGRADING
index f4c4765c4aeb78e23755be8a5ece2b3df3004aac..344c221273a4e26a4dc06c460fc800d0554b01fc 100644 (file)
--- a/UPGRADING
+++ b/UPGRADING
@@ -95,6 +95,11 @@ PHP 7.1 UPGRADE NOTES
 - Core:
   . Support for ftok()
 
+- FCGI
+  . PHP_FCGI_CHILDREN is respected. If this environment variable is defined,
+    the first php-fcgi.exe process will exec the specified number of children.
+    Those will share the same TCP socket. 
+
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 13. Other Changes
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