* JGit v5.1.13.202002110435-r

* [spotbugs] Fix potential NPE in FSTest
* Remove unused import in CreateFileSnapshotBenchmark
* RepositoryCache: don't require HEAD in git repositories
* FileRepository: cleanup refs outside refs/ on reftable conversion

* JGit v5.5.0.201908280940-m3

* PacketLineIn: Add an iterator over strings in the input stream
* Replace most usages of PacketLineIn.END with PacketLineIn.end()
* PacketLineIn: Deprecate DELIM constant

* Update Orbit to S20180820175350 for 2018-09 M3

* Fix NPE in BlameGenerator.getSourceStart()

* Seek references by prefix in reftable

* Remove useless for(;;) loop
* Fix DiffFormatter for diffs against working tree with autocrlf=true

* GC: Merge if statement with the enclosing one
* GC: Replace Files methods with File alternatives
* GC: Replace anonymous classes with lambdas
* GC: Simplify lambda
* GC: Simplify reference equals() method

* Fix javadoc in org.eclipse.jgit.lfs
* Fix javadoc in org.eclipse.jgit.junit
* Fix javadoc in org.eclipse.jgit.junit.http

* RefList: Support capacity <= 0 on new builders
* Short-circuit writing packed-refs if no refs were packed
* BatchRefUpdate: Clarify some ref prefix calls

* Update Jetty to 9.4.1.v20170120

* Upgrade buck to 7b7817c48f

* Improve exception thrown when pull can't find advertised ref
* Silence unchecked conversion warning in TransportSftp
* Silence deprecation warning in WindowCacheConfig
* Silence deprecation warning in DirCacheCheckout
* Fix hidden field warnings in bundle org.eclipse.jgit

* Replace use of deprecated release() method in BlameResult
* Use try-with-resource to close BlameGenerator

* Fix RawText.getLineDelimiter() for empty first line

* Merger: clarify getBaseCommit javadoc
* Reuse Merger's ObjectReader from ResolveMerger

* Preserve merges during pull if configured to do so
* Rebase: Add --preserve-merges support
* Repository.writeMergeHeads to accept a list with subtypes of ObjectId
* Cherry-Pick: Support --no-commit

* Ban dangerous ref names in Windows

* More helpful InvalidPathException messages (include reason)

* Fix formatting of PackConfig.toString() & GC.RepoStatistics.toString()
* Allow to get repo statistics from GarbageCollectionCommand before gc

* Introduce "never" as parseable date

* Properly parse first line in ReceivePack with no '\0'

* Include eclipse.inf

* PackWriter: Skip progress messages on fast operations
* IndexPack: Defer the "Resolving deltas" progress meter
* IndexPack: Fix "Resolving deltas" progress meter