* Compare getting all refs except specific refs with seek and with filter
* Add getsRefsByPrefixWithSkips (excluding prefixes) to ReftableDatabase
* Add seekPastPrefix method to RefCursor

* Update Orbit to R20201130205003 for 2020-12

* UploadPack: Use more relevant refs first in object reachability check
* UploadPack: Refactor to generalize the object reachability checks
* UploadPack: Use BitmappedReachabilityChecker for not advertised wants
* revwalk: Introduce bitmap-based object reachability checker
* revwalk: Extract ObjectReachabilityChecker interface
* UploadPack: Extract walk-based reachability check

* ReceivePack: Reduce visibility of methods

* Export all packages of o.e.j.ant and o.e.j.archive bundles
* Do not require test bundles to export all packages
* Fix API problem filters

* RebaseCommand: fix ONTO_NAME, and --preserve-merges is interactive
* Fix core.autocrlf for non-normalized index

* pgm: Fix missing braces in Diff.run()
* pgm: Handle exceptions in Diff command

* Merge branch 'stable-4.7' into stable-4.8

* Upgrade maven-shade-plugin to 3.2.1

* Bazel: Add missing test dependency on ObjectIdMatcher

* Prepare 5.1.0-SNAPSHOT builds

* dfs: Fix incorrect use of reference == for DfsStreamKey

* ArchiveCommand: Create prefix entry with commit time

* Config: do not add spaces before units

* BaseReceivePack: null and IllegalStateException cases for getPushOptions

* Remove no longer needed outdated API warning filter

* 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

* ResolveMerger: Use checkoutEntry during abort
* Cleanup double stat update of symlinks in DirCacheCheckout
* Deprecate checkoutEntry variant that accepts File
* DirCacheCheckout: create only one ObjectReader

* blame: Format commit and author only once per range

* Fix the parameters to an exception

* NLS warning cleanup

* Always use try/finally around DfsBlockCache.clockLock
* DfsBlockCache: Fix NPE when evicting empty cell