dlls/icmp/icmp.spec

@ stdcall IcmpCloseHandle(ptr)
@ stdcall IcmpCreateFile()
@ stub  IcmpParseReplies
@ stub  IcmpSendEcho2
@ stdcall IcmpSendEcho(ptr long ptr long ptr ptr long long)
@ stub  do_echo_rep
@ stub  do_echo_req
@ stub  register_icmp