chore: import upstream snapshot with attribution

sendmail/edit_generic.cgi

@@ -0,0 +1,16 @@
+#!/usr/local/bin/perl
+# edit_generic.cgi
+# Edit an existing generic
+
+require './sendmail-lib.pl';
+require './generics-lib.pl';
+&ReadParse();
+$conf = &get_sendmailcf();
+@gens = &list_generics(&generics_file($conf));
+&can_edit_generic($gens[$in{'num'}]) ||
+	&error($text{'gform_ecannot'});
+
+&ui_print_header(undef, $text{'gform_edit'}, "");
+&generic_form($gens[$in{'num'}]);
+&ui_print_footer("list_generics.cgi", $text{'generics_return'},
+	"", $text{'index_return'});