Added systemd files and patch for xl2tpd

tmpfiles-xl2tpd.conf

@@ -0,0 +1 @@
+D /var/run/xl2tpd 0755 root root -

xl2tpd-1.3.1-Wunused.patch

@@ -0,0 +1,41 @@
+diff --git a/control.c b/control.c
+index 0892df9..a124d04 100644
+--- a/control.c
++++ b/control.c
+@@ -1685,7 +1685,6 @@ void handle_special (struct buffer *buf, struct call *c, _u16 call)
+        * call if it was a CDN, otherwise, send a CDN to notify them
+        * that this call has been terminated.
+      */
+-    struct buffer *outgoing;
+     struct tunnel *t = c->container;
+     /* Don't do anything unless it's a control packet */
+     if (!CTBIT (*((_u16 *) buf->start)))
+@@ -1705,7 +1704,6 @@ void handle_special (struct buffer *buf, struct call *c, _u16 call)
+             return;
+         }
+         /* Make a packet with the specified call number */
+-        outgoing = new_outgoing (t);
+         /* FIXME: If I'm not a CDN, I need to send a CDN */
+         control_zlb (buf, t, c);
+         c->cid = 0;
+diff --git a/network.c b/network.c
+index 783a181..82aedd7 100644
+--- a/network.c
++++ b/network.c
+@@ -377,7 +377,7 @@ void network_thread ()
+      * our network socket.  Control handling is no longer done here.
+      */
+     struct sockaddr_in from, to;
+-    unsigned int fromlen, tolen;
++    unsigned int fromlen;
+     int tunnel, call;           /* Tunnel and call */
+     int recvsize;               /* Length of data received */
+     struct buffer *buf;         /* Payload buffer */
+@@ -443,7 +443,6 @@ void network_thread ()
+ 	    memset(&to,   0, sizeof(to));
+ 	    
+ 	    fromlen = sizeof(from);
+-	    tolen   = sizeof(to);
+ 	    
+ 	    memset(&msgh, 0, sizeof(struct msghdr));
+ 	    iov.iov_base = buf->start;

xl2tpd.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Level 2 Tunnel Protocol Daemon (L2TP)
+After=syslog.target network.target
+After=openswan.service
+Wants=openswan.service
+
+[Service]
+Type=simple
+PIDFile=/var/run/xl2tpd/xl2tpd.pid
+ExecStart=/usr/sbin/xl2tpd -D
+
+[Install]
+WantedBy=multi-user.target