Minor BTRFS talk cleanup

Commiting few changes I did before final presentation on last release
party.

btrfs/chameleon.tex

@@ -103,19 +103,19 @@
    \item \textbf{number}
    \begin{itemize}
       \item keeps only \textit{number} of newest snapshots
-      \item option \texttt{NUMBER\_CLEANUP} in sysconfig file
    \end{itemize}
    \item \textbf{timeline}
    \begin{itemize}
       \item almost same as previous
       \item keeps also \textit{number} of every type of timeline snapshot
-      \item option \texttt{TIMELINE\_CLEANUP} in sysconfig file
    \end{itemize}
    \item \textbf{empty-pre-post}
    \begin{itemize}
       \item deletes pre/post pairs when there is no change
-      \item option \texttt{EMPTY\_PRE\_POST\_CLEANUP} in sysconfig file
    \end{itemize}
+   \vspace{.5cm}
+   \item All cleanups are enabled by default in openSUSE
+   \item Settings can be tweaked in \texttt{/etc/snapper/configs/}\textit{volume}
 \end{itemize}
 \end{frame}