Log Message:
Update darkstat to 3.0.715.
per maintainer updater request by PR 46241.

v3.0.715 (January 2012)
	- Compatibility fixes for Hurd and Solaris.
	- Use link-time optimization and automake-like silent rules.
	- Support systems without ifaddrs.h again.
	- Continuing fixes for IPv6 support.
	- Only update lastseen time for sender, not recipient.
	- Implement --local-only: accounting for hosts on the local net.
        - Make failure to bind() a socket non-fatal.
	- Make failure to get local IP non-fatal.
	- Fall back to gethostbyaddr() if getnameinfo() fails.
	- Fix detection of IPv4 multicast addresses.
	- Fix decoding on OpenBSD DLT_NULL interfaces (e.g. gif(4))