lsfd: decode protocol numbers of RAW and RAW6 sockets

lsfd: decode protocol numbers of RAW and RAW6 sockets

NOTE: this chage breaks compatibility of existing -Q expression used
in a shell script; the data type of RAW.PROTOCOL has changed from
<number> to <string>.

With this change, lsfd decodes RAW.PROTOCOL with a built-in table
based on linux/in.h and getprotobynumber(3) that may refer to
/etc/protocols internally.

In addition, this change adds RAW.PROTOCOL.RAW column that holds
the original protocol numbers.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>