don't install essential packages in run_install()

mmdebstrap

@@ -2722,13 +2722,18 @@ sub run_install() {
         any { $_ eq $options->{variant} }
         ('required', 'important', 'standard', 'buildd')
     ) {
+        # Many of the priority:required packages are also essential:yes. We
+        # make sure not to select those here to avoid useless "xxx is already
+        # the newest version" messages.
         my $priority;
         if (any { $_ eq $options->{variant} } ('required', 'buildd')) {
-            $priority = '?priority(required)';
+            $priority = '?and(?priority(required),?not(?essential))';
         } elsif ($options->{variant} eq 'important') {
-            $priority = '?or(?priority(required),?priority(important))';
+            $priority = '?and(?or(?priority(required),?priority(important)),'
+              . '?not(?essential))';
         } elsif ($options->{variant} eq 'standard') {
-            $priority = '?or(~prequired,~pimportant,~pstandard)';
+            $priority = '?and(?or(~prequired,~pimportant,~pstandard),'
+              . '?not(?essential))';
         }
         $pkgs_to_install{
             "?narrow("