sizeof protosw = 104
inetsw entries = 13
inetsw[ 0]: pr_protocol=0    pr_input=(nil)               pr_type=0   (IP base)
inetsw[ 1]: pr_protocol=17   pr_input=0xffffffff807ccc20  pr_type=2   (UDP)
inetsw[ 2]: pr_protocol=6    pr_input=0xffffffff807b8e40  pr_type=1   (TCP)
inetsw[ 3]: pr_protocol=255  pr_input=0xffffffff807b5e40  pr_type=3   (RAW)
inetsw[ 4]: pr_protocol=1    pr_input=0xffffffff807ae0a0  pr_type=3   (ICMP)
inetsw[ 5]: pr_protocol=2    pr_input=0xffffffff8079b740  pr_type=3   (IGMP)
inetsw[ 6]: pr_protocol=46   pr_input=0xffffffff807b1de0  pr_type=3   (RSVP)
inetsw[ 7]: pr_protocol=4    pr_input=0xffffffff807a9e70  pr_type=3   (IPinIP)
inetsw[ 8]: pr_protocol=55   pr_input=0xffffffff807a9e70  pr_type=3   (MH)
inetsw[ 9]: pr_protocol=47   pr_input=0xffffffff807a9e70  pr_type=3   (GRE)
inetsw[10]: pr_protocol=41   pr_input=0xffffffff807a9e70  pr_type=3   (IPv6encap)
inetsw[11]: pr_protocol=0    pr_input=0xffffffff807b5e40  pr_type=3   (RAW wildcard)
inetsw[12]: pr_protocol=112  pr_input=0xffffffff807a35e0  pr_type=3   (VRRP/CARP)

=> NO entry has pr_protocol=240 (IPPROTO_PFSYNC). The pfsync_input
   registration block in in_proto.c:281-296 is #ifdef NPFSYNC and
   NPFSYNC is never defined anywhere in sys/.