* Merge branch 'stable-5.11' into stable-5.12

* BatchRefUpdate: Skip saving conflicting ref names and prefixes in memory
* BatchRefUpdateTest: Accurately assert RefsChangedEvent(s) fired
* Optimize RefDirectory.isNameConflicting()

* GitlinkMergeTest: fix boxing warnings
* Remove unused API problem filters
* Add missing since tag on BundleWriter#addObjectsAsIs
* Merge branch 'master' into stable-5.9

* [bazel] Add missing dependency to slf4j-api

* Merge branch 'stable-5.5'

* Config: Add helper method to check for empty value
* ErrorProne: Increase severity of FutureReturnValueIgnored to ERROR
* FS_Win32: Add missing parentheses on if-blocks
* Upgrade spotbugs to 3.1.12

* Wait opening new packfile until it can't be racy anymore

* pgm: Fix missing braces in Push.run()
* pgm: Handle exceptions in Push command
* pgm: Fix missing braces in MergeBase.run()
* pgm: Handle IOException in MergeBase command
* pgm: Fix missing braces in Merge command
* pgm: Handle exceptions in Merge command
* pgm: Fix missing braces in LsTree.run()
* pgm: Handle exceptions in LsTree command
* pgm: Fix missing braces in LsRemote.run()
* pgm: Handle exceptions in LsRemote command
* pgm: Handle exceptions in LsFiles command
* pgm: Fix missing braces in Log.run()
* pgm: Handle exceptions in Log command
* pgm: Handle exceptions in Init command
* pgm: Handle IOException in IndexPack command
* pgm: Fix missing braces in Fetch.run()
* pgm: Handle IOException in Fetch command
* pgm: Handle GitAPIException in Gc command
* pgm: Fix missing braces in DiffTree.run()
* pgm: Handle exceptions in DiffTree command

* DfsBlockCache to lock while loading object references

* Merge branch 'stable-4.9' into stable-4.10

* Merge branch 'stable-4.9' into stable-4.10

* Make local assert methods private in test classes

* Config: Handle leading/trailing single whitespaces

* ReflogWriter: Minor cleanup
* Eliminate SectionParser construction boilerplate

* gc: loosen unreferenced objects

* Add Neon target platform

* ConcurrentRepackTest: Don't use deprecated WindowCache.reconfigure
* ConcurrentRepackTest: Open RevWalk in try-with-resource
* CommitOnlyTest: Open RevWalk in try-with-resource
* UnpackedObjectTest: Create ObjectInserter.Formatter in try-with-resource
* FileRepositoryBuilderTest: Use try-with-resource for auto-closeables
* RepositorySetupWorkDirTest: Fix "resource leak" warnings

* Update com.jcraft.jsch to 0.1.53

* Restored obsoleted createSymLink/readSymLink in FileUtil

* Update comments about PackStatistics

* Use ANY_DIFF filter in ResolveMerger only for bare repositories

* TestRepository: Allow setting explicit Change-Id
* TestRepository: Ignore existing Change-Id in message
* TestRepository: Support committing to unborn symref
* TestRepository: Expose some getters for CommitBuilder
* TestRepository: Add methods to amend commits or refs
* TestRepository: Add a reset method to move HEAD around
* TestRepository: Optionally insert Change-Id in commit message

* Fix push to repo with non-fetched refs

* JGit v3.3.0.201402191814-rc1

* Abort before delete in FileUtils.delete EMPTY_DIRECTORIES_ONLY|RECURSIVE

* Add a case statement for fast-forward merge

* Ignore /target

* Fix a complicated multi level nested if block structure to use a single level with multiple returns.
* Merge branch 'stable-1.0'