* Migrate to Apache MINA sshd 2.6.0 and Orbit I20210203173513
* LFSPointerTest: suppress errorprone error [SelfComparison]

* Client-side protocol V2 support for fetching

* WindowCache: conditional JMX setup

* Suppress API error for RefDatabase.hasFastTipsWithSha1()
* Remove API filters which became obsolete after bumping version to 5.7.0
* Add missing @since tag for ReceivePack#receiveWithExceptionPropagation
* Prepare 5.7.0-SNAPSHOT builds
* Merge branch 'stable-5.6'

* Move ServiceMayNotContinueException handling code from sendPack
* Move exception handling code to the caller
* Do not ignore secondary failure
* Add assertThrows

* Merge branch 'stable-5.0' into stable-5.1

* Factor out a JSch-independent ssh config parser
* Ssh tests with an Apache MINA sshd test git server

* Introduce new RawText constructor and RawParseUtils.lineMapOrBinary

* Make PackInserter public

* PackInserter: Implement newReader()
* Move some strings from DfsText to JGitText
* FileRepository: Add pack-based inserter implementation
* ObjectDirectory: Factor a method to close open pack handles
* ObjectDirectory: Remove last modified check in insertPack

* Exclude file matching: fix backtracking on match failures after **
* Fix path pattern matching to work also for gitattributes
* Add new tests for gitignore/gitattribute pattern matching

* [infer] Fix ObjectWalk leak in PackWriter.preparePack()

* LfsStore: Don't invoke toString on String variable

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

* Skip redundant 'OR-reuse' step in tip commit bitmap setup

* Don't keep empty ignore rules in the ignore node list
* Allow leading/trailing spaces in ignore rules
* Don't crash while parsing ignore patterns
* Allow leading literal '#' and '!' in ignore rules if they are escaped
* Don't trim trailing space if it is escaped with backslash
* Consider only escaping backslash for regular expressions in ignore rules

* Delete deprecated TemporaryBuffer.LocalFile constructors
* Delete deprecated FileUtils.setExecute(File, boolean)
* Delete deprecated WorkingTreeIterator.isModified(DirCacheEntry, boolean)
* Delete deprecated UploadPackMayNotContinueException
* Delete deprecated TransferConfig.isFsckObjects()
* Delete deprecated TextBuiltin.out
* Delete deprecated Merger.getBaseCommit()

* Extend FileUtils.delete with option to delete empty directories only

* Add CleanCommand to JGit API