Remove documentation about the inconsistent and dangerous @stopdaemon

pkg provide an equivalent mechanism which does not need a mark up in the plist

Approved by:	gavin

en_US.ISO8859-1/books/porters-handbook/book.xml

@@ -9572,26 +9572,6 @@ run_rc_command "$1"</programlisting>
 	  <filename>.sh</filename> suffix.</para>
       </note>
 
-      <sect2>
-	<title>Stopping Services at Deinstall</title>
-
-	<para>It is possible to have a service stopped automatically
-	  as part of the deinstall routine.  We advise using this
-	  feature only when it is absolutely necessary to stop a
-	  service before its files go away.  Usually, it is up to the
-	  administrator's discretion to decide, whether to stop the
-	  service on deinstall or not.  Also note this affects
-	  upgrades, too.</para>
-
-	<para>A line like this goes in the
-	  <filename>pkg-plist</filename>:</para>
-
-	<programlisting>@stopdaemon doormand</programlisting>
-
-	<para>The argument must match the content of
-	  <makevar>USE_RC_SUBR</makevar> variable.</para>
-      </sect2>
-
       <sect2>
 	<title>Pre-Commit Checklist</title>