Fix the `unaligned.h` shim in the tests that was causing corruption in
the tests. Note that this is a problem with the test shim, not the
kernel code.

Add HUF_writeCTable_wksp() function

This saves ~700 bytes of stack space in HUF_writeCTable.

Reduce stack usage of ZSTD_buildCTable()

It is a stack high-point for some compression strategies and has an easy
fix. This moves the normalized count into the entropy workspace.

New direct seekTable access methods

and simple roundtrip test

Seekable hang fix

read-only objects are properly const-ified in parameters

[contrib] Support seek table-only API

Prepare Codebase for v1.4.9 Release

Avoid Using `stat -c` on NetBSD

Detect `..` in Paths Correctly

Addresses #2493. I think. I don't have a NetBSD system to test on.

This commit addresses #2509.

[regression] Update results.csv

Fixes the update from PR #2508. I had accidentally forgotten to rebuild
the library, and the regression test suite isn't hooked up to the new
fancy build system yet.

I've double checked that the results are deterministic.

Use standard md5 tool on NetBSD.

CMake: Enable only C for lib and programs projects

[regression] Update results.csv

9f327c02 changed the compression method
for LDM, so the results are slightly different.

I've re-tested LDM on some larger inputs and everything seems fine.
These ratio changes just seem to be noise. There is generally a 0.01%
swing in ratio, sometimes better sometimes worse, but never large.

update FreeBSD image to latest 12.2

Stop using deprecated reset?Stream functions

These are replaced by the corresponding context resets. When
converting resetCStream, CCtx_setPledgedSrcSize isn't called if the
source size is "unknown".

This helps reduce the reliance on "static only" symbols, as well as
reducing the use of deprecated functions.

Signed-off-by: Stephen Kitt <steve@sk2.org>