* GlobalBundleCache: Fix ClassNewInstance warning from Error Prone

* Fix API error filter settings

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

* Fix error log message in ObjectDirectory.handlePackError()
* Properly format pack checksums in PackFile.idx()
* Cancel gc if thread was interrupted
* PackFile: report correct message for checksum mismatch
* ObjectDirectory: Clean up logging
* Bazel: Stop using native.git_repository
* ObjectDirectory: extra logging on packfile exceptions

* Merge branch 'stable-5.2'

* Abort rename detection in a timely manner if cancelled

* Use CHARSET in FileOutputStream instead of hard-coded "UTF-8"
* TemporaryBufferTest: Suppress "should be managed by try-with-resource"

* FS: Open TemporaryBuffer in try-with-resource
* EditListTest: Open InputStream in try-with-resource
* EGitPatchHistoryTest: Open BufferedReader in try-with-resource
* T0003_BasicTest: Use CommitBuilder.setEncoding(Charset)
* WalkEncryptionTest: Use StandardCharsets.UTF_8
* GetTextTest: Use StandardCharsets constants instead of CharSet.forName
* EGitPatchHistoryTest: Set input stream encoding with constant
* DirCacheIterator: Open InputStream in try-with-resource
* DumbClientSmartServerTest: Open auto-closeable resources in try-with-resource
* DirCacheCheckoutTest: Open FileInputStream in try-with-resource
* DiffFormatterReflowTest: Open InputStream in try-with-resource

* Upgrade error_prone_core to 2.2.0
* RefDirectory#hasLooseRef: Fix stream resource leak reported by error-prone

* 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

* Fix committing empty commits

* dfs: Fix DataFormatException: 0 bytes to inflate
* dfs: actually allow current DfsBlock to GC
* dfs: test for repositories sharing blocks in DfsBlockCache

* dfs: Fix caching of index, bitmap index, reverse index
* dfs: Use special ForReverseIndex DfsStreamKey wrapper instead of derive

* Revert "Update Jetty to 9.4.1.v20170120"

* Merge branch 'stable-4.6'

* Use FS#lastModified instead of File#lastModified
* Don't check lastModified, length on folders for submodules

* daemon: Add --ketch=LEADER flag
* Ketch: Intercept push and route it through Ketch
* Ketch: Simple map of running leader instances
* Ketch: Basic replication system

* Add option to allow empty commits to CommitCommand

* buck: set vm_args for tests

* Remove unused import 'org.apache.commons.codec.binary'

* PushCertificateParser: Move reader parsing to instance method
* PushCertificateParser: Make constructor public
* Report PackProtocolExceptions to client during receive-pack
* PushCertificate: implement hashCode/equals/toString
* PushCertificateParser: Make pushee optional
* PushCertificateParser: Change error string for invalid field
* PushCertificateParser: Add method for parsing from a stream
* IO: Add a method for reading lines
* BaseReceivePack: Treat all LFs as optional
* BaseReceivePack: More validation during parseCommand

* 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 tests on windows by closing repos

* Introduce config parameter core.trustfolderstat
* Fix javadoc formatting in ConfigConstants

* Throw URISyntaxException for incorrect percent-encoding

* Enable to prepare interactive rebase and then start it explicitly

* Prepare post 3.1.0 builds

* JGit v3.0.2.201311090911-r

* Enable writing bitmaps during GC by default.
* Enable writing pack indexes with bitmaps in the GC.
* Enable serving upload requests using bitmaps.
* Support creating pack bitmap indexes in PackWriter.
* Added read/write support for pack bitmap index.

* Remove unused imports

* Update smudged entries when writing index

* Support a configured credentials provider in LsRemoteCommand