fix grammar

manuals/en/main/state.tex

@@ -181,7 +181,7 @@ \subsection{Current Implementation Restrictions}
 %    Normally this can happen only if you manually enter specific
 %    JobIds to be restored in a single restore Job.
 \item \label{MultipleCatalogs} It is possible to configure the Bareos Director to use multiple Catalogs.
-   However, this is either adviced, not supported.
+   However, this is neither adviced, nor supported.
    Multiple catalogs require more management because in general
    you must know what catalog contains what data, e.g. currently, all Pools are defined in each catalog.
 \item Bareos can generally restore any backup made from one client