This is release v1.4.0, "Fisematenten". This release includes several new features and bugfixes, improves compatibility with git, and begins preparation for SHA256 support in a future release.
## What's Changed
### New features
* diff: update rename limit to 1000 to match git's behavior by @ethomson in https://github.com/libgit2/libgit2/pull/6092
* odb: support checking for object existence without refresh by @joshtriplett in https://github.com/libgit2/libgit2/pull/6107
* object: provide a low-level mechanism to validate whether a raw object is valid (`git_object_rawcontent_is_valid`) by @ethomson in https://github.com/libgit2/libgit2/pull/6128
* blob: provide a function to identify binary content by @ethomson in https://github.com/libgit2/libgit2/pull/6142
* status: add `rename_threshold` to `git_status_options`. by @arroz in https://github.com/libgit2/libgit2/pull/6158
* remote: support `http.followRedirects` (`false` and `initial`) and follow initial redirects by default by @ethomson in https://github.com/libgit2/libgit2/pull/6175
* remote: support scp style paths with ports (`[git@github.com:22]:libgit2/libgit2`) by @ethomson in https://github.com/libgit2/libgit2/pull/6167
* win32: update git for windows configuration file location compatibility by @csware in https://github.com/libgit2/libgit2/pull/6151 and @ethomson in https://github.com/libgit2/libgit2/pull/6180
* refs: speed up packed reference lookups when packed refs are sorted by @ccstolley in https://github.com/libgit2/libgit2/pull/6138
* merge: support zdiff3 conflict styles by @ethomson in https://github.com/libgit2/libgit2/pull/6195
* remote: support fetching by object id (using "+oid:ref" refspec syntax) by @ethomson in https://github.com/libgit2/libgit2/pull/6203
* merge: callers can specify virtual-base building behavior and to optionally accept conflict markers as a resolution by @boretrk in https://github.com/libgit2/libgit2/pull/6204
### Bug fixes
* Fix a gcc 11 warning in src/threadstate.c by @lhchavez in https://github.com/libgit2/libgit2/pull/6115
* Fix a gcc 11 warning in src/thread.h by @lhchavez in https://github.com/libgit2/libgit2/pull/6116
* cmake: re-enable WinHTTP by @ethomson in https://github.com/libgit2/libgit2/pull/6120
* Fix repo init when template dir is non-existent by @ammgws in https://github.com/libgit2/libgit2/pull/6106
* cmake: use project-specific root variable instead of CMAKE_SOURCE_DIR by @Qix- in https://github.com/libgit2/libgit2/pull/6146
* Better revparse compatibility for at time notation by @yoichi in https://github.com/libgit2/libgit2/pull/6095
* remotes: fix insteadOf/pushInsteadOf handling by @mkhl in https://github.com/libgit2/libgit2/pull/6101
* git_commit_summary: ignore lines with spaces by @stforek in https://github.com/libgit2/libgit2/pull/6125
* Config parsing by @csware in https://github.com/libgit2/libgit2/pull/6124
* config: handle empty conditional in includeIf by @ethomson in https://github.com/libgit2/libgit2/pull/6165
* #6154 git_status_list_new case insensitive fix by @arroz in https://github.com/libgit2/libgit2/pull/6159
* futils_mktmp: don't use umask by @boretrk in https://github.com/libgit2/libgit2/pull/6178
* revparse: support bare '@' by @ethomson in https://github.com/libgit2/libgit2/pull/6196
* odb: check for write failures by @ethomson in https://github.com/libgit2/libgit2/pull/6206
* push: Prepare pack before sending pack header. by @ccstolley in https://github.com/libgit2/libgit2/pull/6205
* mktmp: improve our temp file creation by @ethomson in https://github.com/libgit2/libgit2/pull/6207
* diff_file: fix crash if size of diffed file changes in workdir by @jorio in https://github.com/libgit2/libgit2/pull/6208
* merge: comment conflicts lines in MERGE_MSG by @ethomson in https://github.com/libgit2/libgit2/pull/6197
* Fix crashes in example programs on Windows (sprintf_s not compatible with snprintf) by @apnadkarni in https://github.com/libgit2/libgit2/pull/6212
### Code cleanups
* Introduce `git_remote_connect_options` by @ethomson in https://github.com/libgit2/libgit2/pull/6161
* hash: separate hashes and git_oid by @ethomson in https://github.com/libgit2/libgit2/pull/6082
*`git_buf`: now a public-only API (`git_str` is our internal API) by @ethomson in https://github.com/libgit2/libgit2/pull/6078
* cmake: cleanups and consistency by @ethomson in https://github.com/libgit2/libgit2/pull/6084
* path: refactor utility path functions by @ethomson in https://github.com/libgit2/libgit2/pull/6104
* str: git_str_free is never a function by @ethomson in https://github.com/libgit2/libgit2/pull/6111
* cmake refactorings by @ethomson in https://github.com/libgit2/libgit2/pull/6112
* Add missing-declarations warning globally by @ethomson in https://github.com/libgit2/libgit2/pull/6113
* cmake: further refactorings by @ethomson in https://github.com/libgit2/libgit2/pull/6114
* tag: set validity to 0 by default by @ethomson in https://github.com/libgit2/libgit2/pull/6119
* util: minor cleanup and refactoring to the date class by @ethomson in https://github.com/libgit2/libgit2/pull/6121
* Minor code cleanups by @ethomson in https://github.com/libgit2/libgit2/pull/6122
* Fix a long long that crept past by @NattyNarwhal in https://github.com/libgit2/libgit2/pull/6094
* remote: refactor insteadof application by @ethomson in https://github.com/libgit2/libgit2/pull/6147
* ntmlclient: fix linking with libressl by @boretrk in https://github.com/libgit2/libgit2/pull/6157
* c99: change single bit flags to unsigned by @boretrk in https://github.com/libgit2/libgit2/pull/6179
* Fix typos by @rex4539 in https://github.com/libgit2/libgit2/pull/6164
* diff_driver: split global_drivers array into separate elements by @boretrk in https://github.com/libgit2/libgit2/pull/6184
* cmake: disable some gnu extensions by @boretrk in https://github.com/libgit2/libgit2/pull/6185
* Disabling setting `CMAKE_FIND_LIBRARY_SUFFIXES` on Apple platforms. by @arroz in https://github.com/libgit2/libgit2/pull/6153
* C90: add inline macro to xdiff and mbedtls by @boretrk in https://github.com/libgit2/libgit2/pull/6200
* SHA256: early preparation by @ethomson in https://github.com/libgit2/libgit2/pull/6192
### CI improvements
* tests: rename test runner to `libgit2_tests`, build option to `BUILD_TESTS`. by @ethomson in https://github.com/libgit2/libgit2/pull/6083
* ci: only update docs on push by @ethomson in https://github.com/libgit2/libgit2/pull/6108
* Pedantic header test by @boretrk in https://github.com/libgit2/libgit2/pull/6086
* ci: build with ssh on nightly by @ethomson in https://github.com/libgit2/libgit2/pull/6148
* ci: improve the name in CI runs by @ethomson in https://github.com/libgit2/libgit2/pull/6198
### Documentation improvements
* Document that `git_odb` is thread-safe by @joshtriplett in https://github.com/libgit2/libgit2/pull/6109
* Improve documentation by @punkymaniac in https://github.com/libgit2/libgit2/pull/6168
### Other changes
* libgit2_clar is now libgit2_tests by @mkhl in https://github.com/libgit2/libgit2/pull/6100
* Remove PSGit from Language Bindings section of README by @cestrand in https://github.com/libgit2/libgit2/pull/6150
* COPYING: remove regex copyright, add PCRE copyright by @ethomson in https://github.com/libgit2/libgit2/pull/6187
* meta: add a release configuration file by @ethomson in https://github.com/libgit2/libgit2/pull/6211
## New Contributors
* @mkhl made their first contribution in https://github.com/libgit2/libgit2/pull/6100
* @ammgws made their first contribution in https://github.com/libgit2/libgit2/pull/6106
* @yoichi made their first contribution in https://github.com/libgit2/libgit2/pull/6095
* @stforek made their first contribution in https://github.com/libgit2/libgit2/pull/6125
* @cestrand made their first contribution in https://github.com/libgit2/libgit2/pull/6150
* @rex4539 made their first contribution in https://github.com/libgit2/libgit2/pull/6164
* @jorio made their first contribution in https://github.com/libgit2/libgit2/pull/6208
