Keyword elision not implemented: sctp

[kbara]

The filter "sctp" compiles with tcpdump, but not with pflua.

% ./pflua-match ../tests/data/wingolog.pcap "sctp"
luajit: ../src/pf/parse.lua:290: 
Error: In expression "sctp"
                          ^
keyword elision not implemented sctp

stack traceback:
        [C]: in function 'primitive_error'
        ../src/pf/parse.lua:290: in function 'error'
        ../src/pf/parse.lua:838: in function 'parse_primitive_or_arithmetic'
        ../src/pf/parse.lua:859: in function 'parse_logical_or_arithmetic'
        ../src/pf/parse.lua:891: in function 'parse_logical'
        ../src/pf/parse.lua:899: in function 'parse'
        ../src/pf.lua:32: in function 'get_predicate'
        ./pflua-match:58: in function 'main'
        ./pflua-match:84: in main chunk
        [C]: at 0x00404bc0

% tcpdump -d "sctp"
(000) ldh      [12]
(001) jeq      #0x86dd          jt 2    jf 7
(002) ldb      [20]
(003) jeq      #0x84            jt 10   jf 4
(004) jeq      #0x2c            jt 5    jf 11
(005) ldb      [54]
(006) jeq      #0x84            jt 10   jf 11
(007) jeq      #0x800           jt 8    jf 11
(008) ldb      [23]
(009) jeq      #0x84            jt 10   jf 11
(010) ret      #65535
(011) ret      #0

[kbara]

Fixed in 81db9d0