Previously we would set the global filter registry structure before
adding filters to the structure, without a lock, which is quite racy.
Now, register default filters during global registration and use an
rwlock to read and write the filter registry (as appopriate).

Use the gcc-like memory barrier (__sync_synchronize) on mingw.

Move the common initialization and cleanup methods to reduce
unnecessary duplication.

Introduce Contributor Covenant

Free allocated pointer to curl stream on error

winhttp: name mangle class / iid on mingw

Export git_stash_apply_init_options

Fix typo

Fix a typo in documentation

Standard Windows type systems define CLSID_InternetSecurityManager
and IID_IInternetSecurityManager, but MinGW lacks these definitions.
As a result, we must hardcode these definitions ourselves.  However,
we should not use a public struct with those names, lest another
library do the same thing and consumers cannot link to both.

Make packfile_unpack_compressed a private API

Fix some issues with generated pkg-config file

ssh_stream_read(): fix possible *bytes_read < 0 branch

index: get rid of the locking

We don't support using an index object from multiple threads at the same
time, so the locking doesn't have any effect when following the
rules. If not following the rules, things are going to break down
anyway.

Handle dotfiles as the repo template dir and inside the template dir

Include dotfiles when copying template directory, which will handle
both a template directory itself that begins with a dotfile, and
any dotfiles inside the directory.

Ensure that we can handle template directories that begin with a
leading dot.

Ensure that `git_repository_init` honors the `init.templatedir`
configuration setting.

Update README URLs based on HTTP redirects

Fix a couple function signatures

Fix the possibility of returning successfully from ssh_stream_read()
with *bytes_read < 0. This would occur if stdout channel read resulted
in 0, and stderr channel read failed afterwards.

Fixed minor typo in README.md.

typos in comments

commit: Fix memory leak in test suite

Index fill: Small fixups