docs: data migration

[Timotheus Pokorra]

Hello Michael,

> 11. Upgrade all messages from Kolab Format:
>
>  sed -e 's/user///g'
>
> Does this work anywhere? I had to change this to "sed -e 's#user/##g'"
This looks like a problem with converting the documentation to Sqhinx.
You can still see the old docs here:
http://docs.kolab.org/en-US/Kolab_Groupware/3.0/html/Administrator_Guide/chap-Administrator_Guide-Upgrading_from_Kolab_2_on_OpenPKG.html#sect-Administrator_Guide-Upgrading_from_Kolab_2_on_OpenPKG-Migration_and_Upgrade_of_Data

There the line is:
 sed -e 's/user\///g'

Please consider fixing the documentation and send a pull request to
https://github.com/kanarip/kolab-docs

Thanks,
   Timotheus