Set maildir for bdsmail

src/freedombone-app-bdsmail

     # Create mutt configuration
     mkdir /etc/skel/.mutt
     echo 'set mbox_type=Maildir' > /etc/skel/.mutt/bdsmail
+    echo 'set mbox="~/Maildir/i2p"' >> /etc/skel/.mutt/bdsmail
     echo 'set smtp_url=smtp://127.0.0.1:2525/' >> /etc/skel/.mutt/bdsmail
     echo 'set use_from=yes' >> /etc/skel/.mutt/bdsmail
     echo "set from=username@${bds_domain}" >> /etc/skel/.mutt/bdsmail