We have been using `uint8_t *`, which works fine as far as
linking goes, but leads fuzz target developers to sometimes
forget why they can't just modify the passed in string instead of
copying it for modification (e.g. to NUL-terminate).

REF: https://llvm.org/docs/LibFuzzer.html#fuzz-target

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>

A temporary file is used to store the fuzzing input.

Signed-off-by: Michael Hanselmann <public@hansmi.ch>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>