Use hex_decode() to parse "hex" and "hexhyp" settings. Note that this
parser is stricter than the old parser; it now requires exactly two
hex digits for each byte. (The old parser was based upon strtoul()
and so would allow leading whitespace and a leading plus or minus
sign.)
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Commit 5ad445f ("[settings] Treat an empty formatted value as meaning
"delete setting"") (re)defined the semantics of storing an empty
formatted setting as meaning "delete setting".
Remove the existing self-test using an empty formatted hex setting
value, since it no longer conforms to the defined semantics.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Michael Brown