s20151218
Initial import of iputils
arping doc: interface is optional (-I option).
arping,clockdiff,ping,rarpd,rdisc,traceroute6 doc: s/CAP_NET_RAWIO/CAP_NET_RAW/.
doc: Ajdust spaces around sqare brackets.
arping,clockdiff,rarpd,rdisc,tftpd: Change RFC source to tools.ietf.org.
[DOC] Maintainer / Contact change
ninfod: Add ninfod(8) manpage.
ping,ping6 doc: More description on CAP_NET_RAW usage.
rdisc doc: Document -r, -p and -T options.
iputils-s20151218
tracepath: Fix missing end tag for OPTION.