If a user runs the tests with a `~/.gitconfig` that provides an
`init.defaultBranch` that is not `master`, our tests fail.  Let's adjust
to the user's configuration as appropriate.  We'll also rename this to
`default_branch` to signify that it may not be called `master` anymore.

(cherry picked from commit ac1d6930)

Co-authored-by: Elliot Saba <staticfloat@gmail.com>

release-1.6: Backports for 1.6.6

(cherry picked from commit 4061e8f8)

(cherry picked from commit 36304bac)

(cherry picked from commit e03ead07)

External stdlibs: stop using the unauthenticated `git://` protocol in the external stdlib URLs (#42906)

(cherry picked from commit 7eba9c1d)

Co-authored-by: Elliot Saba <staticfloat@gmail.com>
(cherry picked from commit dfcd63f1)

(cherry picked from commit 2c9e051c)

(cherry picked from commit dc61f29c)

Co-authored-by: Simeon Schaub <schaub@mit.edu>
(cherry picked from commit 85365223)

(cherry picked from commit b4055629)

On Windows, we observed occasional issues where an error within the
function callback to the `open(::Function, ::Cmd)` method would cause
problems due to assuming that the opened process had finished by the
time the `open()` call was finished.  In most cases this was true,
however on Windows, it was found that we need to explicitly `wait()`
upon the process object to ensure that all file handles held by the
subprocess were properly closed by the time `open()` is finished.

Co-authored-by: Dilum Aluthge <dilum@aluthge.com>
(cherry picked from commit 623ceb78)

Co-authored-by: Jameson Nash <vtjnash@gmail.com>
Co-authored-by: Fredrik Ekre <ekrefredrik@gmail.com>
(cherry picked from commit f5d9b86c)

(cherry picked from commit f61eb87c)

(cherry picked from commit f53de735)

Fix #44227

(cherry picked from commit f731c38b)

(cherry picked from commit 610fc206)

Co-authored-by: Simeon David Schaub <schaub@mit.edu>
(cherry picked from commit 2338f5d3)

We collect the relocations (i.e. the GOT slots that is used in the code) for each target
in `tgt.relocs`. Needing a relocation, however, does not imply that the function is cloned
for this target within the group (It does mean that at least one target
in the group has it cloned). The previous version would miss the relocation in this case.

This was triggerred with the following cloning situation

    caller: clone_1
    callee: clone_1, clone_1.clone_3

Since caller.clone_1 may call either callee.clone_1 or callee.clone_1.clone_3 a relocation
for callee will be used and is required to be initialized.
In addition to target 1, target 2 (and in fact target 3) within group 1
will also use caller.clone_1. However, since callee isn't cloned for target 2
the previous version wouldn't have saved this slot in the relocation array.

(cherry picked from commit 76fc0671)

(cherry picked from commit 0b48b91c)

* [CPUID] Rework how current ISA is determined

* [CPUID] Add ISA entry for A64FX

* [CPUID] Add ISA entry for Apple Silicon M1

* [CPUID] Simplify collection of full set of features for architecture

* [CPUID] Remove AES from A64FX ISA, not all chips appear to have it

(cherry picked from commit f45b6adb)

We have 2 copies of this data, and so need to make sure we are pointing
at the correct one for runtime.

(cherry picked from commit 2f1f2f6e)

Because we might not have synchronized the list again yet.

(cherry picked from commit cac90b57)

(cherry picked from commit 0c44d238)

(cherry picked from commit c839221d)

(cherry picked from commit 2db86f23)

(cherry picked from commit 4c101a15)

(cherry picked from commit 546a7747)

(cherry picked from commit c10dac10)

(cherry picked from commit c3235cda)

(cherry picked from commit 97690241)

We could also consider adding `defalg(v::AbstractArray{<:Number}) = DEFAULT_UNSTABLE`,
but it is unlikely that someone will want to do `Union` of `<:Number`
and something other than `Missing` that still would support comparison.

Relevant for https://github.com/JuliaStrings/InlineStrings.jl/issues/21
(and other custom types that will want to add `defalg` support allowing
for `Union` with `Missing`).

(cherry picked from commit eb724e00)

Fixes #43702

(cherry picked from commit 9d05e7bf)

To avoid the compiler potentially picking the wrong size depending on standards versions.

(cherry picked from commit e8d11673)

See comment in diff for explanation. This fixes test/stacktraces.jl
on aarch64 macOS 12, and according to an OpenJDK issue where they
ran into the same problem, https://git.openjdk.java.net/jdk/pull/6193,
probably also x86_64 macOS 12.

(cherry picked from commit 7f27dea1)

Constructing the Regex touched in this commit can represent a
significant fraction (e.g. half or better) of the runtime of
the DateFormat method touched in this commit. To make this
DateFormat method more efficient, let's lift that Regex
construction out of that method body.

(cherry picked from commit 7fb5bb8a)

The last entry sentinel for Win64 SEH is `~0L` not NULL. Apparently
this doesn't cause issues on windows proper, but does crash wine.
Arguably if Windows doesn't have issues then we should just fix
this in wine, but since we control the source and nobody else
ever seems to have run into this, let's just fix it and save
the good Wine folks some headache. Fixes #43569.

(cherry picked from commit 722f9d49)

* Look for package name in `[extras]`

When Preferences.jl set's a preferences in a non-top-level package,
it adds that package to the `[extras]` entries in the project path.

Package loading should have used thhose entries to map the module uuid
to the key name in the Preferences.toml

Fixes https://github.com/JuliaPackaging/Preferences.jl/issues/24



Co-authored-by: Elliot Saba <staticfloat@gmail.com>
(cherry picked from commit 8197c418)