chore: import upstream snapshot with attribution

procmail/backup_config.pl

@@ -0,0 +1,42 @@
+
+do 'procmail-lib.pl';
+
+# backup_config_files()
+# Returns files and directories that can be backed up
+sub backup_config_files
+{
+local @conf = &get_procmailrc();
+local @rv = map { $_->{'file'} } @conf;
+return &unique(@rv);
+}
+
+# pre_backup(&files)
+# Called before the files are actually read
+sub pre_backup
+{
+return undef;
+}
+
+# post_backup(&files)
+# Called after the files are actually read
+sub post_backup
+{
+return undef;
+}
+
+# pre_restore(&files)
+# Called before the files are restored from a backup
+sub pre_restore
+{
+return undef;
+}
+
+# post_restore(&files)
+# Called after the files are restored from a backup
+sub post_restore
+{
+return undef;
+}
+
+1;
+