Add support list

README.md

@@ -1,4 +1,18 @@
 # Layer 2 tunneling protocol network server (LNS)
 
+l2tpns notably supports:
+
+- radius authentication/authorization
+- accounting
+- clustered load balancing and fail-over
+- MPPP
+- BGP
+- kernel-level acceleration
+- throttling
+- snooping
+- walled garden
+- plugins
+- a management cli
+
 * Mailing list: <https://lists.ffdn.org/wws/info/l2tpns>
 * Code: <https://code.ffdn.org/l2tpns/l2tpns>