=head1 NAME
-lei-mark - set/unset metadata on messages
+lei-tag - set/unset metadata on messages
=head1 SYNOPSIS
-lei mark [OPTIONS] FILE [FILE...] METADATA [METADATA...]
+lei tag [OPTIONS] FILE [FILE...] METADATA [METADATA...]
-lei mark [OPTIONS] (-|--stdin) METADATA [METADATA...]
+lei tag [OPTIONS] (-|--stdin) METADATA [METADATA...]
=head1 DESCRIPTION