without flags, the main fping binary is v4/v6 dual stack, use -4 / -6 to
force one particular af.
a v6-only fping6 is installed to provide support for dependent ports, using
the method from https://github.com/schweikert/fping/pull/139
software which should not run as root, and doing this manually after
a pkg_add update is error-prone.
- rewrite DESCR. clearly note that the binaries are made setuid.
- Makefile de-uglification.
- bump PKGNAME.
no objections to the setuid change from ajacoutot@, weerd@
"I think its utterly retarded not to suid it for you" phessler@
