* Enable CommitCommand to use a fluent style

* Merge branch 'stable-5.11'

* Do not prematurely create directory of jgit's XDG config file
* FS: write to JGit config in a background thread
* FS: don't cache fallback if running in background

* Upgrade maven-site-plugin to 3.9.1
* Upgrade build-helper-maven-plugin to 3.2.0
* Upgrade spotbugs to 4.0.4

* Add 4.16 staging target platform

* ApplyCommand: use Files#copy to copy file
* Apply hunks when renaming or copying from patch files
* Create parent directories when renaming a file in ApplyCommand

* UploadPack: Use reachability checker to validate non-advertised wants
* BitmappedReachabilityChecker: Reachability check using bitmaps
* BitmapCalculator: Get the reachability bitmap of a commit
* ReachabilityChecker: Default implementation with a RevWalk

* ReceivePackAdvertiseRefsHookTest: Open TestRepository in try-with-resource
* SubmoduleStatusTest: Open TestRepository in try-with-resource
* UploadPackTest: Open TestRepository in try-with-resource
* PackParserTest: Open TestRepository in try-with-resource
* SmartClientSmartServerTest: Open TestRepository in try-with-resource
* Stop using deprecated methods of RemoteSetUrlCommand/RemoteRemoveCommand
* SmartClientSmartServerTest: Stop using deprecated Repository#hasObject
* DumbClientSmartServerTest: Open TestRepository in try-with-resource
* DumbClientDumbServerTest: Open TestRepository in try-with-resource
* DirCacheCheckoutTest: Open TestRepository in try-with-resource
* HttpTestCase#fsck: Open TestRepository in try-with-resource

* Prepare 5.1.4-SNAPSHOT builds

* ssh: Prefer algorithms of the known host keys

* JGit v5.1.2.201810061102-r
* Merge branch 'stable-5.0' into stable-5.1

* MergeFormatter{Pass}: Use Charset instead of String
* Deprecate Constants.CHARACTER_ENCODING in favor of StandardCharsets.UTF_8
* Bazel: Increase severity of MissingFail to ERROR
* TestProtocolTest: Add missing calls to fail()

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

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

* Merge branch 'stable-4.8' into stable-4.9

* reftable: reserve standard PackExt
* reftable: resolve symbolic references
* reftable: support threshold based compaction
* reftable: compact merged tables
* reftable: merge-join reftables
* reftable: lookup by ObjectId unit tests
* reftable: reflog unit tests
* reftable: namespace unit tests
* reftable: bulk operation unit tests
* reftable: basic functionality unit tests
* reftable: debug tools
* reftable: scan and lookup reftable files
* reftable: create and write reftable files
* reftable: file format documentation

* Fetch: Add --recurse-submodules and --no-recurse-submodules options

* RepoCommand: Add linkfile support.

* Remove unused import from ManifestParser

* [infer] Mark ManifestParse.getFilteredProjects non-null
* [infer] Fix potential NPE in DiffFormatter
* [infer] Fix potential NPE in CloneCommand

* Normalizer creating a valid branch name from a string

* CLI: implement option -d for deleting tags

* Replace use of deprecated release() in BasePackPushConnection
* Replace use of deprecated release() in BasePackFetchConnection

* Move checkPath from DirCacheCheckout to ObjectChecker

* Don't import non-existing package org.eclipse.jgit.java7

* Add a method to DfsOutputStream to read as an InputStream

* Further cleanup of exceptions in Git API

* Add IGNORE_ERRORS to FileUtils.delete()

* Move writeTrashFile and deleteFile into JGitTestUtil

* Fix the names in the reflog for checkouts
* Add a helper for parsing branch switch info out of a reflog entry