cmp: accept SI suffixes for skip1 and skip2

[kevans]

Summary

This is compatible with GNU cmp.

Sponsored by: Klara, Inc.

[imp]

usr.bin/cmp/cmp.1

93

Power of 2 or power of 10?

[imp]

usr.bin/cmp/tests/cmp_test2.sh

91

This test suggests not SI bot power of 2

[imp]

These suffixes are the power-of-two suffixes, not the SI suffixes which are strictly power of 10.

While I don't mind if we accept them as power-of-two, we shouldn't use 'SI' to refer to them.
Of course, we do refer to them incorrectly in that way in expand_number(3).
We use the SI names for the IEE/IEC values.

[imp]

Maybe just an entry in the bugs section that SI suffixes use the traditional power of 2 values as described in .Xr expand_number 3.

usr.bin/cmp/cmp.1

93

"may also be specified with power of 2 size suffixes."

w

[kevans]

Address imp's feedback

[imp]

One last minor nit. Thanks for listening.

usr.bin/cmp/cmp.1

182

maybe s/verbiage/phrase/ here makes sense?

[kevans]

s/verbiage/phrase/