--- a/build-aux/mdate-sh	Thu Sep 21 21:39:59 2017 -0700
+++ b/build-aux/mdate-sh	Fri Sep 22 16:10:23 2017 -0700
@@ -1,7 +1,7 @@
 #!/bin/sh
 # Get modification time of a file or directory and pretty-print it.
 
-scriptversion=2017-09-19.11; # UTC
+scriptversion=2017-09-22.02; # UTC
 
 # Copyright (C) 1995-2017 Free Software Foundation, Inc.
 # written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995
@@ -75,7 +75,7 @@
 export LC_TIME
 
 # Use UTC to get reproducible result.
-TZ=UTC
+TZ=UTC0
 export TZ
 
 # GNU ls changes its time format in response to the TIME_STYLE

--- a/doc/maintain.texi	Thu Sep 21 21:39:59 2017 -0700
+++ b/doc/maintain.texi	Fri Sep 22 16:10:23 2017 -0700
@@ -5,7 +5,7 @@
 @c For double-sided printing, uncomment:
 @c @setchapternewpage odd
 @c This date is automagically updated when you save this file:
-@set lastupdate September 19, 2017
+@set lastupdate September 21, 2017
 @c %**end of header
 
 @dircategory GNU organization
@@ -1895,6 +1895,10 @@
 directive remains optional, and the @code{filename} directive is not
 allowed.
 
+The @file{.sig} file should not be explicitly mentioned in a directive.
+When you specify a directive to operate on a file, its corresponding
+@file{.sig} file will be handled automatically.
+
 When uploaded by itself, the name of the directive file is not
 important.  But it must be still be signed, using @samp{gpg
 --clearsign}; the resulting @file{.asc} file is what should be