documentation: Standardize announcement file text.

Normalize the accompanying text for the release announcement across
core packages: standardize chapter name and GPG information.

ChangeLog

@@ -9,6 +9,13 @@
 	nonfragile ABI (true for modern apple systems we may be interested in
 	using). Regenerate configure script.
 
+2020-04-13  Ivan Vucica <ivan@vucica.net>
+
+	* Documentation/announce.texi:
+	* ANNOUNCE:
+	Normalize the accompanying text for the release announcement across
+	core packages: standardize chapter name and GPG information.
+
 2020-04-13  Richard Frith-Macdonald <rfm@gnu.org>
 
 	* Headers/Foundation/NSURLProtocol.h:

Documentation/announce.texi

@@ -1,3 +1,4 @@
+@c -*- texinfo -*-
 @chapter Announcement
 
 @c set the vars GNUSTEP-BASE-VERSION and GNUSTEP-BASE-GCC-VERSION
@@ -31,9 +32,31 @@ at @samp{http://www.gnustep.org}.
 @ifset GNUSTEP-BASE-FTP-MACHINE
 The gnustep-base-@value{GNUSTEP-BASE-VERSION}.tar.gz distribution file has 
 been placed at @url{ftp://@value{GNUSTEP-BASE-FTP-MACHINE}/@value{GNUSTEP-BASE-FTP-DIRECTORY}}.
+
+It is accompanied by gnustep-base-@value{GNUSTEP-BASE-VERSION}.tar.gz.sig, a
+PGP signature which you can validate by putting both files in the same
+directory and using:
+
+@example
+gpg --verify gnustep-base-@value{GNUSTEP-BASE-VERSION}.tar.gz.sig
+@end example
+
+Signature has been created using the key with the following fingerprint:
+
+@example
+83AA E47C E829 A414 6EF8  3420 CA86 8D4C 9914 9679
+@end example
 @end ifset
 
+Read the INSTALL file or the GNUstep-HOWTO for installation instructions.
+
+@section Where do I send bug reports?
+
 Please log bug reports on the GNUstep project page
 @url{http://savannah.gnu.org/bugs/?group=gnustep} or send bug
 reports to @email{bug-gnustep@@gnu.org}.
 
+@section Obtaining GNUstep Software
+
+Check out the GNUstep web site. (@url{http://www.gnustep.org/}) and the
+GNU web site. (@url{http://www.gnu.org/})