before this change, we rely on the default-generated fmt::formatter created
from operator<<, but fmt v10 dropped the default-generated formatter.
in this change, we define formatters for `utils::human_readable_value`,
and drop its operator<<
Refs #13245
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
Instead of lengthy blurbs, switch to single-line, machine-readable
standardized (https://spdx.dev) license identifiers. The Linux kernel
switched long ago, so there is strong precedent.
Three cases are handled: AGPL-only, Apache-only, and dual licensed.
For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0),
reasoning that our changes are extensive enough to apply our license.
The changes we applied mechanically with a script, except to
licenses/README.md.
Closes#9937
This utility function converts a potentially large number to a compact
representation, composed of at most 4 digits and a letter appropriate to
the power of two the number has to multiplied with to arrive to the
original number (with some loss of precision).
The different powers of two are the conventional 2 ** (N * 10) variants:
* N=0: (B)ytes
* N=1: (K)bytes
* N=2: (M)bytes
* N=3: (G)bytes
* N=4: (T)bytes
Examples:
* 87665 will be converted to 87K
* 1024 will be converted to 1K
