bgpd: encap: add encap SAFI (RFC5512)

Adds RFC5512 and Encapsulation Attribute.

Signed-off-by: Lou Berger <lberger@labn.net>
diff --git a/bgpd/bgp_encap.h b/bgpd/bgp_encap.h
new file mode 100644
index 0000000..6f43b7b
--- /dev/null
+++ b/bgpd/bgp_encap.h
@@ -0,0 +1,34 @@
+/* 
+ *
+ * Copyright 2009-2015, LabN Consulting, L.L.C.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ */
+
+#ifndef _QUAGGA_BGP_ENCAP_H
+#define _QUAGGA_BGP_ENCAP_H
+
+extern void bgp_encap_init (void);
+extern int bgp_nlri_parse_encap (
+    afi_t,
+    struct peer *,
+    struct attr *,
+    struct bgp_nlri *,
+    int withdraw);
+
+#include "bgp_encap_types.h"
+#endif /* _QUAGGA_BGP_ENCAP_H */