appveyor: replace PowerShell with bash + parallel autotools

PowerShell works (after a steep development curve), but one property of
it stuck and kept causing unresolvable usability issue

appveyor: replace PowerShell with bash + parallel autotools

PowerShell works (after a steep development curve), but one property of
it stuck and kept causing unresolvable usability issues: With
`$ErrorActionPreference=Stop`, it does abort on failures, but shows only
the first line of the error message. In `Continue` mode, it shows the
full error message, but doesn't stop on all errors. Another issue is
PowerShell considering any stderr output as if the command failed (this
has been improved in 7.2 (2021-Nov), but fixed versions aren't running
in CI and will not be for a long time in all test images.)

Thus, we're going with bash.

Also:
- use `-j2` with autotools tests, making them finish 5-15 minutes per
job faster.
- omit `POSIX_PATH_PREFIX`.
- use `WINDIR`.
- prefer forward slashes.

Follow-up to: 75078a415d9c769419aed4153d3d525a8eba95af #11999
Ref: #12444

Fixes #12560
Closes #12572

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tidy-up: fix yamllint whitespace issues

Closes #12466

CI: don't run CI jobs if only another CI was changed

A few paths were missed in the last commit, as well as a job added since
then.

Followup-to 395b9175

CI: skip some more builds when possible

When a commit only contains tests, documentation, or cmake files, skip
those builds that aren't affected by those.

The file filters avail

CI: skip some more builds when possible

When a commit only contains tests, documentation, or cmake files, skip
those builds that aren't affected by those.

The file filters available on the CI services don't seem to allow
skipping individual jobs, only the entire workflow, so we can't get any
more fine-grained than this.

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CI: don't run CI jobs if only another CI was changed

Also skip builds on non-Windows platforms when only Windows build files
have changed.

This should reduce the number of usele

CI: don't run CI jobs if only another CI was changed

Also skip builds on non-Windows platforms when only Windows build files
have changed.

This should reduce the number of useless builds and the associated
waiting time and chance of spurious failures, freeing resources for
new PRs.

Closes #10742

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copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- save

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- saves us from pointless churn
- git keeps history for us
- the year range is kept in COPYING

checksrc is updated to allow non-year using copyright statements

Closes #10205

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ci: Reuse fuzzing snippet from curl-fuzzer project

GHA: clarify workflows permissions, set least possible privilege

Set top-level permissions to None on all workflows, setting per-job
permissions. This avoids that new jobs inherit unwant

GHA: clarify workflows permissions, set least possible privilege

Set top-level permissions to None on all workflows, setting per-job
permissions. This avoids that new jobs inherit unwanted permissions.

Discussion: https://curl.se/mail/lib-2022-11/0028.html

Signed-off-by: Diogo Teles Sant'Anna <diogoteles@google.com>

Closes #9928

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CI/GHA: cancel outdated CI runs on new PR changes

Avoid letting outdated CI runs continue if a PR receives
new changes. Outside a PR we let them continue running
by tying the concurr

CI/GHA: cancel outdated CI runs on new PR changes

Avoid letting outdated CI runs continue if a PR receives
new changes. Outside a PR we let them continue running
by tying the concurrency to the commit hash instead.

Also only let one CodeQL or Hacktoberfest job run at a time.

Other CI platforms we use have this build in, but GitHub
unfortunately neither by default nor with a simple option.

This saves CI resources and therefore a little energy.

Approved-by: Daniel Stenberg
Approved-by: Max Dymond
Closes #9533

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copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

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GHA: align all install, configure and build steps again

First step towards more unified build steps on GitHub Actions.

Closes #8873

ci: update github actions

- bump actions/checkout from 2 to 3
- bump actions/upload-artifact from 1 to 3
- bump github/codeql-actions from 1 to 2
- use version tag for actions/ch

ci: update github actions

- bump actions/checkout from 2 to 3
- bump actions/upload-artifact from 1 to 3
- bump github/codeql-actions from 1 to 2
- use version tag for actions/checkout

Closes #8843

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GHA: add a linux-hyper job

Closes #7206

github actions: run when pushed to master or */ci + PRs

Avoid double-builds when using "local" branches for PRs. For both macos
and fuzz jobs.

Closes #5201

CI-fuzz: increase fuzz time to 40 minutes

Closes #5174

CI: bring GitHub Actions fuzzing job in line with macOS jobs

Update YAML formatting, job naming and triggers.

CIfuzz: switch off 'dry_run' mode

Follow-up from #4960: now make it fail if it detects problems.

Closes #4998

github action: add CIFuzz

Closes #4960