Log Message:
Add grepcidr-2.9.

From the man page:
grepcidr can be used to filter a list of IP addresses against one or
more IPv4 and IPv6 address ranges.  As with grep, there are options to
invert matching and load patterns from a file.  grepcidr is designed to
scale well, and handle large numbers of patterns and large input files
efficiently.  This version uses a completely rewritten parser that is
typically two or three times faster than previous versions.