Add "hack/install.sh" to the "PRs welcome" note in the end of the install script

Also, simplified the output method by using `cat >&2 <<EOF ...` instead of multiple lines of `echo >&2 '...'`.

Signed-off-by: Andrew Page <admwiggin@gmail.com>
move stdcopy to pkg/stdcopy

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
stdcopy: improve perf by avoiding buffer growth

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Benchmark for StdWriter.Write

Signed-off-by: Alexandr Morozov <lk4d4@docker.com>
Merge pull request #6 from LK4D4/benchmark_for_8084

Benchmark for StdWriter.Write
Merge pull request #8085 from tianon/hack-install-location

Add "hack/install.sh" to the "PRs welcome" note in the end of the install script
Merge pull request #8084 from unclejack/improve_stdcopy

stdwriter: improve perf by avoiding buffer growth
integcli: run build tests in tmpdir

Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Merge pull request #8088 from unclejack/integcli-keep_permissions

integcli: run inaccessible context test in tmpdir
tarsum: name collision fix

If a tar were constructed with duplicate file names, then depending on
the order, it could result in same tarsum.

Signed-off-by: Vincent Batts <vbatts@redhat.com>
Merge pull request #7889 from vbatts/vbatts-tarsum_name_collision

tarsum: name collision fix
tarsum: allow for alternate block ciphers

Not breaking the default cipher and algorithm for calculating checksums,
but allow for using alternate block ciphers during the checksum
calculation.

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)