* Prepare 5.12.1-SNAPSHOT builds

* Add target platform for eclipse 4.19 staging
* Update orbit to S20210105214148 and com.google.gson to 2.8.6

* Prepare 5.9.0-SNAPSHOT builds

* Fix downloading LFS Object fails behind proxy

* Merge branch 'stable-5.2' into stable-5.3

* PackWriter/Statistics: Report offloaded size
* CachedPackUriProvider: Add size to the pack information

* reftable: move AutoCloseable to ReftableReader

* JGit v5.1.6.201903130242-r

* FetchV2Request.getWantedRefs: Bump @since to 5.4

* Fix error log message in ObjectDirectory.handlePackError()
* Properly format pack checksums in PackFile.idx()

* Specify charset when constructing InputStreamReader

* Ensure index change event is fired when index snapshot changed

* LFS: Enable LFS support for the CLI, better error handling
* Cleanup stream usage WRT filters
* LFS: support merge/rebase/cherry-pick/diff/compare with LFS files

* JGit v4.9.1.201712030800-r
* Silence API warnings for reintroduced ResolveMerger#processEntry

* Detect stale-file-handle error in causal chain

* Git{Add|Clone}Task: Catch specific exceptions rather than Exception

* Support per-BatchRefUpdate atomic transactions

* NoteMapTest: Open TreeWalk instances in try-with-resource
* ObjectDirectoryTest: Fix warnings about variable hiding
* PackWriterTest: Open RevWalk in try-with-resource
* PatchIdDiffFormatterTest: Open Git and PatchIdDiffFormatter in try-with-resource
* PathSuffixFilterTest: Open TreeWalk in try-with-resource
* PostOrderTreeWalkTest: Open TreeWalk in try-with-resource
* PullCommandWithRebaseTest: Open RevWalk in try-with-resource
* PushCommandTest: Open Git instances in try-with-resource
* RacyGitTests: Open NameConflictTreeWalk in try-with-resource
* RecursiveMergerTest: Open TreeWalk and BufferedReader in try-with-resource
* ReflogConfigTest: refactor commit method to avoid variable hiding
* Update .mailmap
* RefDirectoryTest: Fix warning about member variable hiding
* ReflogResolveTest: Open Git instances in try-with-resource
* ReflogTest: Open Git instances in try-with-resource
* RepoCommandTest: Open Git instances in try-with-resource

* ProgressSpinner: Simple busy wait entertainment

* Rename copyThroughCache to shouldCopyThroughCache
* Add readAheadBuffer hint to ReadableChannel

* JGit v3.7.0.201502260915-r

* Enable maven site generation for jgit
* Generate javadocs as part of Maven site project reports
* Compare API changes with clirr against 3.4.1

* Allow users to show server messages while pushing

* blame: Compute the origin of lines in a result file