* Merge branch 'stable-5.12'

* sshd: use PropertyResolver in test
* Remove dependency on JSch from SSH test framework

* Remove double blank from sentence start

* Merge branch 'stable-5.6' into stable-5.7

* Fix unclosed resource warning in SmartOutputStream
* JschConfigSessionFactory: fix boxing warning
* SshSupport#runSshCommand: don't throw exception in finally block
* Don't override already managed maven-compiler-plugin version
* Remove unused import from CreateFileSnapshotBenchmark
* Remove duplicate ignore_optional_problems entry in .classpath

* JGit v5.1.12.201910011832-r

* Fix wrong placeholder index in error message packInaccessible
* JGitText: Remove unused externalized strings
* RepoText: Remove unused externalized string
* CLI: Remove unused externalized strings

* UploadPack: Filter refs used for deepen-not resolution
* Merge branch 'stable-5.1' into stable-5.2

* Merge branch 'stable-4.10' into stable-4.11

* Add ObjectIdSerializer
* CheckoutCommandTest: Fix name of created temp file
* IgnoreNodeTest: Suppress deprecation warnings in testEmptyIgnoreNode
* Fix warnings about boxing/unboxing Boolean
* WorkingTreeIterator: Fix warnings about variable hiding
* WorkingTreeIterator: Add NON-NLS suppressions

* Upgrade maven-compiler-plugin to 3.7.0

* Revert "Update Jetty to 9.4.1.v20170120 in buck build"

* Archive: Make project name consistent with other subprojects'

* Update Orbit repository for Neon to R20160520211859

* TagCommandTest: Instantiate Git and RevWalk objects in try-with-resource
* BlameCommandTest: Instantiate Git objects in try-with-resource

* Bitmap generation: Add a test of ordering commits by "chains"

* Fix that exceptions in ReceivePack cause Invalid Channel 101 exceptions
* Better report too large pack-files from PushCommand

* Don't set REWRITE flag unless parent rewriting is requested
* Rename RewriteTreeFilter to TreeRevFilter and make it public

* Unit test for the updating behavior in RepoCommand API.

* Add long filename, large file, and non-ASCII filename support to TarFormat

* Increase PackOutputStream copy buffer to 64 KiB
* Tighten object header writing in PackOutuptStream
* Skip main thread test in ThreadSafeProgressMonitor
* Declare members of PackOutputStream final
* Always allocate the PackOutputStream copyBuffer
* Disable CRC32 computation when no PackIndex will be created
* Steal work from delta threads to rebalance CPU load

* Fix Check for FF_ONLY merges again

* Use System.arraycopy to copy parent object id array

* Add toString() to HunkHeader

* Clean up tab usage in Directory/File conflict table

* Document the show methods of RevWalkTextBuiltin

* DirCacheCheckout: unlock DirCache in case of failure