Clean up a2news/tin installation

ipv6 should be enabled on Raspbian nowadays, so we should no longer need
to modify the stock exim configuration.  If it gives you an error on
startup, let me know and we'll put it back.

scripts/install_comm_tools

@@ -133,24 +133,23 @@ install_a2news() {
 	### CommTools: Install tin + a2news script
 	sudo install -o root -g root -m 755 "$a2cSource/setup/a2news" /usr/local/bin/a2news
 	if ! hash tin 2> /dev/null; then
-		echo "A2CLOUD: Installing a2news/tin..."
+		echo "A2CLOUD: Installing tin..."
 		sudo apt-get -y install tin
 		sudo apt-get -y clean
 	else
-		echo "A2CLOUD: a2news/tin is already installed."
+		echo "A2CLOUD: tin is already installed."
 	fi
 
-	# FIXME: Installing tin pulls in exim4, and it used to have an error at
-	#        startup.  We should check to see if it still does.
+	# Leaving this here just in case, but it should not be necessary anymore.
 
-	### CommTools: Configure exim4 to use ipv4 to kill console errors
-	# have exim4 use IPv4 only to prevent log errors (IPv6 is off by default in Raspbian)
-	if [[ $(grep ' ; ::1' /etc/exim4/update-exim4.conf.conf) ]]; then
-		echo "A2CLOUD: Setting exim4 to use only IPv4 to prevent startup error messages..."
-		sudo sed -i 's/ ; ::1//' /etc/exim4/update-exim4.conf.conf
-		sudo update-exim4.conf
-		sudo rm /var/log/exim4/mainlog /var/log/exim4/paniclog &> /dev/null
-	fi
+#	### CommTools: Configure exim4 to use ipv4 to kill console errors
+#	# have exim4 use IPv4 only to prevent log errors (IPv6 is off by default in Raspbian)
+#	if [[ $(grep ' ; ::1' /etc/exim4/update-exim4.conf.conf) ]]; then
+#		echo "A2CLOUD: Setting exim4 to use only IPv4 to prevent startup error messages..."
+#		sudo sed -i 's/ ; ::1//' /etc/exim4/update-exim4.conf.conf
+#		sudo update-exim4.conf
+#		sudo rm /var/log/exim4/mainlog /var/log/exim4/paniclog &> /dev/null
+#	fi
 
 	# restore exim4 log directory if occupied by a file put there by earlier A2CLOUD versions
 	if [[ -f /var/log/exim4 ]]; then