* reftable: add random suffix to table names

* Update Orbit to S20201118210000 and add target for 4.18

* ReceivePack: Remove unused getLockMessageProcessName method
* ReceivePack: Remove unnecessary ReceivePack. prefix on static call

* UploadPack: Create a method that propagates an exception as-is
* UploadPack: Consolidate the sideband handling code to one place
* UploadPack: Introduce ErrorWriter

* ProtocolV2Parser: Add missing $NON-NLS suppression
* UploadPackTest: Stop using deprecated PacketLineIn constants
* Fix parsing of core.logAllRefUpdates

* sshd: add missing javadoc in SshTestGitServer
* sshd: shared reference in JGitClientSession must be volatile
* sshd: correct the protocol version exchange

* Error Prone: Increase severity of NonOverridingEquals to ERROR
* Error Prone: Increase severity of ImmutableEnumChecker to ERROR
* GitDateParser#ParseableSimpleDateFormat: Make formatStr private final
* BatchRefUpdateTest: Suppress ImmutableEnumChecker warning
* PacketLineIn: Suppress comparison warnings for END and DELIM
* FileSnapshot#toString: Suppress ReferenceEquality warnings
* Blame: Suppress ReferenceEquality warning for RevCommit instances

* JGit v4.7.6.201810191618-r

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

* FileBasedConfig: support for relative includes
* Config: extract method to read included config
* ConfigTest: fix on Windows

* Avoid bad rounding "1 year, 12 months" in date formatter

* HttpClientConnection: Register connection socket factory for http
* Add dependency to org.apache.commons.logging used by Apache HttpClient

* LfsServerTest: Remove unnecessary suppression of 'restriction' warning
* WrappedRequest: Don't use deprecated ServletRequestWrapper#realPath
* Suppress deprecation warnings related to UploadPackLogger
* AppServer: Remove unnecessary 'unused' suppressions
* HttpClientConnection: Don't use deprecated HttpClient classes

* Added Java 7 launch config with LANG env. variable set

* Repository: Log negative useCnt message together with stack trace

* Add EOL stream type detection to TreeWalk

* RepositoryTestCase: Open autocloseable types in try-with-resource

* Add a separate type for the identity in a push certificate
* PushCertificateParser: include begin/end lines in signature
* PushCertificateParser: throw PackProtocolException in more cases
* Extract a class for signed push configuration
* BaseReceivePack: fix reading cert lines in command loop

* FS: Extract GobblerThread into a private static class

* FS: Remove the gitprefix logic
* SystemReader: Use discoverGitSystemConfig() in openSystemConfig()
* FS: Add a method to discover the system-wide config file
* FS: Extend readPipe() to optionally take additional environment
* FS: Document readpipe()'s encoding parameter
* Split discoverGitPrefix() code out into discoverGitExe()
* Equalize discoverGitPrefix() implementations between POSIX and Win32
* Move resolveGrandparentFile() to the base class for wider use

* Use try-with-resource to close resources in DiffCommand

* Use try-with-resource to close resources in DirCache

* Cleanup TreeWalk creation/release inside StashApplyCommand
* Deprecate checkoutEntry without ObjectReader

* Cherry-Pick: Support --mainline to pick merges

* Make JGit test work with both hamcrest 1.1 (juno) and 1.3 (kepler)

* TagCommand should be able to create unannotated tags too

* Throw API exception when LsRemoteCommand fails with TransportException

* DHT: Add sequence RefData