* gprs_ns2_frgre: check iph/ip6h before passing them to rx functions
* gprs_ns2_frgre: set a correct gre pointer for ipv6
* frame_relay: fix NULL pointer deref
* gprs_ns2_fr: free_bind(): first do the NULL check before using members
* gprs_ns2: unify the handling of **result when bind already present.
* gprs_ns2_vc_fsm: rename ST_ALIVE -> ST_RECOVERING
* gprs_ns2_vc_fsm: reset ALIVE N counter when restarting the test procedure.
* ns2: remove obsolete type GPRS_NS2_LL_E1
* ns2: move link layer type into NSE
* ns2: move LL into public api
* ns2: permit multiple nsvci in one nse in VTY
* ns2: implement link sharing selector
* ns2: add support for frame relay