config.txt: move receive-config.txt to config/

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -391,7 +391,7 @@ include::config/push.txt[]
 
 include::config/rebase.txt[]
 
-include::receive-config.txt[]
+include::config/receive.txt[]
 
 remote.pushDefault::
 	The remote to push to by default.  Overrides