[zstdgrep] Log zstd decompression errors to stderr

Dont log errors when ZSTD_fseBitCost() returns an error

--show-default-cparams Adding hashLog

* Replacing with boilerplate from cirrus

* Adding task name and adding back freebsd 11.x

* Changing from 11.3 to freebsd-11-3-snap

* Rearanging the order of matrix and instance

man page : added `--verbose` long command

also updated `zstd.1`
stacking prior updates completed on `zstd.1.md`.

Fix pkg-config File Generation Again

Update CIFuzz file and turn off dry-run mode

Allow some CLI options to accept numeric values up to size_t

Fix forgotten portable header prefix

[doc] Adding notes about CI and an outline of collaboration workflow

When the `PCLIBDIR` or `PCINCDIR` is non-empty (either because we succeeded
in removing the prefix, or because it was manually set), we don't need to
perform the check. This lets us trust users who go to the trouble of setting
a manual override, rather than still blindly failing the make.

They'll still be prefixed with `${prefix}/` / `${exec_prefix}/` in the
pkg-config file though.

Revises #1851. Fixes #1900. Replaces #1930.

Thanks to @orbea, @neheb, @Polynomial-C, and particularly @eli-schwartz for
pointing out the problem and suggesting solutions.

Tested with

  ```
  make -C lib clean libzstd.pc
  cat lib/libzstd.pc

  # should fail
  make -C lib clean libzstd.pc     LIBDIR=/foo
  make -C lib clean libzstd.pc INCLUDEDIR=/foo
  make -C lib clean libzstd.pc     LIBDIR=/usr/localfoo
  make -C lib clean libzstd.pc INCLUDEDIR=/usr/localfoo
  make -C lib clean libzstd.pc     LIBDIR=/usr/local/lib     prefix=/foo
  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local/include prefix=/foo

  # should succeed
  make -C lib clean libzstd.pc     LIBDIR=/usr/local/foo
  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local/foo
  make -C lib clean libzstd.pc     LIBDIR=/usr/local/
  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local/
  make -C lib clean libzstd.pc     LIBDIR=/usr/local
  make -C lib clean libzstd.pc INCLUDEDIR=/usr/local
  make -C lib clean libzstd.pc     LIBDIR=/tmp/foo prefix=/tmp
  make -C lib clean libzstd.pc INCLUDEDIR=/tmp/foo prefix=/tmp
  make -C lib clean libzstd.pc     LIBDIR=/tmp/foo prefix=/tmp/foo
  make -C lib clean libzstd.pc INCLUDEDIR=/tmp/foo prefix=/tmp/foo

  # should also succeed
  make -C lib clean libzstd.pc prefix=/foo LIBDIR=/foo/bar INCLUDEDIR=/foo/
  cat lib/libzstd.pc

  mkdir out
  cd out
  cmake ../build/cmake
  make
  cat lib/libzstd.pc
  ```

PR #1987 forgot to prefix another include causing lz4 detection to fail.

[CIFuzz] Rename output path to artifacts

Enable oss-fuzz CIFuzz dogfood

* make 4.3 build issue fix

* Changing header name and adding comment

* Displaying level in --show-default-cparams

* Displaying actual enum value instead of level

* Removing symbols that are not being tested

* Removing symbols used in zstdcli, fileio, dibio and benchzstd

* Removing symbols used in zbuff and add test-zbuff to travis

* Removing remaining symbols and adding unit tests instead

* Removing symbols test entirely

Using appliedParams instead of "supplied" params in compressBegin()

Adding --show-default-cparams to cli 

Benchzstd multiple file decompression enable