Switch perl 822-date and changelog/debian as well to use the new Dpkg

module and its variables.

ChangeLog

@@ -17,6 +17,8 @@
 	* scripts/dpkg-statoverride.pl: Likewise.
 	* scripts/install-info.pl: Likewise.
 	* scripts/update-alternatives.pl: Likewise.
+	* scripts/822-date.pl: Likewise.
+	* changelog/debian.pl: Likewise.
 
 	* scripts/controllib.pl (init_substvars): Remove comment about
 	$version needing to be a global variable set elsewhere.

scripts/822-date.pl

@@ -3,7 +3,8 @@
 use strict;
 use warnings;
 
-our $dpkglibdir = "."; # This line modified by Makefile
+use Dpkg;
+
 push(@INC, $dpkglibdir);
 require 'dpkg-gettext.pl';
 textdomain("dpkg-dev");

scripts/changelog/debian.pl

@@ -7,9 +7,7 @@
 use strict;
 use warnings;
 
-our $progname;
-our $version = '1.3.0'; # This line modified by Makefile
-our $dpkglibdir = "."; # This line modified by Makefile
+use Dpkg;
 
 push(@INC,$dpkglibdir);
 require 'controllib.pl';