Compare the input and output files by their inode number and
refuse to open the output file if the input file is the same.

This doesn't work when (de)compressing multiple files to a single
file, but that is a very uncommon use case, mostly used for
benchmarking by me.

Fixes #1422.

overlapLog default values

Add multiple_simple_compression.c (demonstrates the use of ZSTD_compressCCtx(...)) to examples directory.

break loadFile_orDie() into 2: loadFile_orDie() loads file into a pre-allocated memory buffer, mallocAndLoadFile_orDie() allocates memory first, then calls loadFile_orDie()

Factor out allocMemory_orDIe(...) in simple_compressionCCtx.c, and amend Makefile to account for dependency on utils.h

meson: Remove unused sys import

[zstdcli] Add --no-progress flag

The `--no-progress` flag disables zstd's progress bars, but leaves
the summary.

I've added simple tests to `playTests.sh` to make sure the parsing
works.

meson: More accurate Windows build support

with correct pointer type

[libzstd] Fix infinite loop in decompression

When we switched `ZSTD_SKIPPABLEHEADERSIZE` to a macro, the places where we do:

    MEM_readLE32(ptr) + ZSTD_SKIPPABLEHEADERSIZE

can now overflow `(unsigned)-8` to `0` and we infinite loop. We now check
the frame size and reject sizes that overflow a U32.

Note that this bug never made it into a release, and was only in the dev branch
for a few days.

Credit to OSS-Fuzz

from 64-bit to 32-bit

travis: Use script instead of Cmd env

Let soversion base on version if not set. For example, if version is 3.6.0
and soversion is not defined, it is set to 3.

Use MESON_INSTALL_DESTDIR_PREFIX variable instead of DESTDIR.

and updated man page

btultra2

and fixed nit

[regression] add more methods

CLI used to set overlapLog at value 9 when level == 22.
This is no longer necessary (handled internally within library)

varies between 6 and 9, depending on strategy

in deeper code layer.
for consistency.