Add plain text section

sections/plain-text.tex

@@ -0,0 +1,31 @@
+\section{Rule number 2: plain text}
+\begin{frame}{De facto standard I}
+    The Linux kernel mailing list simply rejects any HTML e-mail~\cite{netiquette:lkml}.\vspace{1em}
+
+    \begin{quote}
+        HTML e-mail - even when it is a multipart mail with a corresponding plain/text section - is unconditionally rejected by mailing lists.
+    \end{quote}
+\end{frame}
+\begin{frame}{De facto standard II}
+    The MediaWiki mailing list etiquette prohibits their use~\cite{netiquette:mediawiki}.\vspace{1em}
+
+    \begin{quote}
+        Don't send HTML email to the list, use text only. Also, don't send dual-format mails containing both text and HTML.
+    \end{quote}
+\end{frame}
+\begin{frame}{De facto standard III}
+    And the curl maintainer really hates them~\cite{netiquette:curl}.\vspace{1em}
+
+    \begin{quote}
+        Please switch off those HTML encoded messages. You can mail all those \textbf{funny mails} to your friends.\vspace{0.5em}
+
+        \textbf{We speak plain text mails}.
+    \end{quote}
+\end{frame}
+\begin{frame}{How to (Thunderbird)}
+    \centering
+    \includegraphics[scale=0.35]{target/slides-thunderbird-plain-text.png}
+\end{frame}
+\begin{frame}{How to (neomutt)}
+    Neomutt sends plain text emails by default.
+\end{frame}