[Bug 260314] ping6: faulty "-4 and -6 cannot be used simultaneously" error on "ping6 -c4 localhost"

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260314

--- Comment #1 from Franco Fichtner <franco@opnsense.org> ---
The parsing of trying to validate -4 against -6 is so lax that this triggers on
unknown and malformed arguments as well (things that don't actually take
arguments). The most worrisome bug happens on

# ping -c6 localhost

Which pings localhost 6 times as expected, but with ping6 utility instead of
ping (using ::1) as target.


Cheers,
Franco

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