* Update Orbit to R20210602031627
* Prepare 5.12.0-SNAPSHOT builds

* Merge branch 'master' into stable-5.10

* Merge branch 'stable-5.5' into stable-5.6

* Merge branch 'master' into next

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

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

* Apache MINA sshd client

* Prepare 5.1.2-SNAPSHOT builds
* JGit v5.1.1.201809181055-r

* Bazel: Format all build files with buildifier 0.15.0

* PackParser: Refactor to open InputStream in try-with-resource
* AutoLFInputStreamTest: Use try-with-resource

* LongObjectIdTest: Remove self comparison test
* RevFlagSetTest: Fix compilation error flagged by error prone
* Move SHA1 compress/recompress files to resource folder

* [findBugs] PackWriter.NONE should be final
* [findBugs] Remove reliance on default encoding in Base64
* [findBugs] Fix potential NPE in CleanFilter
* [findBugs] Fix potential NPE in ObjectDirectoryTest
* [findBugs] Fix potential NPE in GcPackRefsTest
* [findBugs] Fix potential NPE in GC
* [findBugs] Fix potential NPE in DirCacheCheckoutTest

* Merge branch 'stable-4.4'

* Make UploadPack observe exceptions reading refs

* Allow deletion of HEAD ref if the repository is bare.

* RefTree: Change peel suffix to " ^" (space carrot)
* FileRepository: Support extensions.refsBackendType = RefTree
* RefTreeDatabase: Ref database using refs/txn/committed

* Add a separate type for the identity in a push certificate
* PushCertificateParser: include begin/end lines in signature
* PushCertificateParser: throw PackProtocolException in more cases
* Extract a class for signed push configuration
* BaseReceivePack: fix reading cert lines in command loop

* Silence API warnings introduced by a85e817d

* Allow lookup of multiple exact refs in one shot

* Replace use of deprecated release() method in BlameResult
* Use try-with-resource to close BlameGenerator

* Allow configurable ObjectCheckers in fetch

* JGit 3.5.0.201409071800-rc1

* Preserve merges during pull if configured to do so
* Rebase: Add --preserve-merges support
* Repository.writeMergeHeads to accept a list with subtypes of ObjectId
* Cherry-Pick: Support --no-commit

* Use branch.<x>.mergeoptions and merge.ff as defaults for merging

* Prepare post 3.0.0 M7 builds

* Fix @since tags in JGit, version 2.4 never existed

* Fix jgit rev-list --objects master

* Use the stored password instead of prompting for it all the time