Hi,
That branch isn't a branch in the jetty project, so the question might be better addressed to the eclipse equinox group.
However, I can tell you that the current release of jetty-9.4 is at version 9.4.44. This is the list of changes from 9.4.43:
jetty-9.4.44.v20210927 - 27 September 2021
+ 3514 Use interpolation of versions from pom in mod files
+ 6369 Increment default jetty.http2.rateControl.maxEventsPerSecond
+ 6372 Review socket options configuration
+ 6487 Expose ServletHolder getter in ServletHandler$ChainEnd for auditing
libraries to use
+ 6491 onDataAvailable() not called when HttpParser is closed prematurely
+ 6520 Error page has HTML error when writePoweredBy is enabled.
+ 6545 image/webp MIME type support
+ 6553 Review usage of Authentication.UNAUTHENTICATED in SecurityHandler
+ 6554 Allow creation of DefaultIdentityService without realmName.
+ 6558 Allow to configure return type in JSON array parsing
+ 6562 HttpOutput.write(ByteBuffer buffer)
+ 6603 HTTP/2 max local stream count exceeded
+ 6617 Add basic auth support for OpenId token endpoint (client_secret_basic)
+ 6618 ID token `azp` claim should not be required if `aud` is single value
array
+ 6652 Improve ReservedThreadExecutor dump
+ 6671 Update to apache jsp 8.5.70
+ 6772 Update to asm 9.2
+ 6853 Remove pack200 plugins
+ 6860 Correct IPv6 format
+ 6869 Correct Content-Type within HTML error pages
+ 6870 Encode control characters in URIUtil.encodePath
+ 6883 Welcome file redirects do not honor the relativeRedirectAllowed option
regards
Jan