Use also Envelope-To for identity selection (#1488553)

Aleksander Machniak

2012-12-12 bb5d7282855dd83ccdd211cb77d0776dce71468e

 program/lib/Roundcube/rcube_storage.php

@@ -65,6 +65,7 @@
        'MAIL-REPLY-TO',
        'RETURN-PATH',
        'DELIVERED-TO',
        'ENVELOPE-TO',
    );

    const UNKNOWN       = 0;