Having multiple <family> in <alias> isn't supported and may not work as
expected

Change-Id: Ifffa81db6829e7e21ff061276e1558dda6b99c71
Reviewed-on: https://gerrit.libreoffice.org/2100Reviewed-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>
Tested-by: Björn Michaelsen <bjoern.michaelsen@canonical.com>