[otrs] Upgrade from 2.1.2 to 2.1.5

[Jozsef Valkai]

> Does anyone know how to manually upgrade from version 2.1.2 to 2.1.5? What
> files got changed and what the changes are? I don't want to download the
> entire rpm or risk loosing any config modifications that I already made.

Upgrade procedure is explaned in UPGRADE file on your otrs tarball/rpm.
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Valkai Jozsef
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