Bug#661654: retitle 661654 libreoffice-common: 'man libreoffice' and 'soffice --help': "--convert-to": mention *all* possible file extensions

[Stéphane Aulery]

retitle 661654 libreoffice-common: 'man libreoffice' and 'soffice 
--help': "--convert-to": mention *all* possible file extensions
tags 661654 - wontfix
stop
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Upstream will fix 'soffice --help'.
To us fix our manpage.

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Stéphane Aulery