Allow jails to use PING(8) without allowing raw socket access.
Raw socket access is allowed for ICMP protocol as is required by
PING(8) but option IP_HDRINCL is not allowed. to accomplish this
a new privilege PRIV_NETINET_ICMP_ACCESS has been added by default
Reference for this implementation was based on:
McDougall Richard; Mauro Jim. Solaris Internals. Pearson Education.