+ **New Features**
**[Server]** Add generic prepare plugin.
**[Server]** Add new class for gathering config data from config file.
**[Server]** Implement firefly network flow monitoring.
**[Server]** Allow prefunctory redirect based on client's net attributes.
**[Server]** Allow embedded spaces in auth id's and paths (acc.encoding).
**[Server]** Allow specification of preferred bind interfaces.
**[Net]** Accommodate K8s network namespaces.
**[cmsd]** Allow flexible path consideration when determining affinity.
**[XrdCl]** Support unaligned PgReads.
**[XrdCl]** Implement PgWrite.
**[XrdCl]** Implement declarative PgRead.
**[XrdCl]** Implement ZipArchive::PgRead.
**[XrdCl]** xrdcp: enables in-fly error correction of corrupted pages
(pgread/pgwrite).
**[XrdCl]** xrdcp: allow multiple --cksum options.
**[XrdCl]** Add checksumming capability to default EC plugin.
**[XrdCl]** SocketHandler: encapsulate the reads/writes operation in
a separate class.
**[XrdCl]** Allow loading XrdEc default plug-in based on cfg file.
**[XrdCl/XrdEc]** Use locate to obtain EC placement gr if empty.
**[XrdEc]** Allow specifying operation t/o.
**[XrdEc]** Make the metadata files relocable.
**[XrdEc]** Allow using the EC lib without metadata files.
**[Xrdpfc]** New cmd line option. Print in json format.
+ **Major bug fixes**
**[Server]** Correct code that frees unsent aio buffers after fatal error.
**[XrdCl]** ZipArchive: always execute callbacks in fresh exec ctx.
**[XrdCl]** Don't issue a close in ~File if the thread-pool has been stopped.
+ **Minor bug fixes**
**[AIO]** Correct test whether or not to turn off aio for Xcache.
**[XrdSciTokens] Avoid double slashes in the final path after rules.
**[Server]** Do not hold cheksum lock across local checksum computation.
**[Server]** Correct notify option handling for kXR_prepare.
**[XrdCl]** Adjust timeout before retransmitting corrupted pages.
**[XrdCl]** Make sure XCpSrc does not leak.
**[XrdCl]** Add missing err msg if force isn't used and destination exits.
**[XrdCl]** Make sure the path on kXR_open does not inlude '?' if there is no cgi.
**[XrdCl]** ParallelOperation: fix race condition in AtLeast policy.
**[CMake]** Install in private-devel XrdClOperationTimeout.hh &
XrdClFinalOperation.hh
+ **Miscellaneous**
**[Plugins]** Improve fault tolerance of redirlocal plugin.
**[Plugins]** Improve fault tolerance of redirlocal plugin.
**[XrdCmsRedirLocal]** Add localroot option for plug-in. Improve fault tolerance
of RedirLocal plug-in.
**[Macaroons]** Relegate debug messages to debug status.
**[Xcache]** Extend pgread API to return number of corrected checksum errors.
**[cmsd]** Allow more parallelism during data server selection.
**[Utils]** Add utility class to handle url encoding and decoding.
**[Utils]** Add generic port specification to port number utility.
**[Apps]** Reintroduce the xrdprep (a.k.a xprep) command.
**[Apps]** Provide cli to compute crc32c checksum (i.e. xrdcrc32c).
**[Server]** Remove limit on number of args passed to a forked exec.
**[Server]** Add method to create an argv list from a string.
**[Server]** Replace XrdOucTrace by XrdSysTrace, part 1 (internal change).
**[Server]** Use RAtomics to enhance performance where needed.
**[Misc]** Implement RAtomics object all of whose operations use relaxed mem order.
**[Misc]** Add XrdPosixMap.hh to private hears (i.e. developers only).
**[XrdHttp]** Add func to obfuscate paths hidden into strings.
**[XrdHttp]** BuffGetData: better handle the case of wait=false.
**[XrdCl]** Avoid calls to PostMaster for local files.
**[XrdCl]** Do read/write recovery on errSocketTimeout.
**[XrdCl]** Include all chunk details in kXR_readv descripsion.
**[CMake]** Find pthreads using the CMake Thread module Prefer -pthread over
-lpthread if supported by the compiler.
**[CMake]** Enable SSE4.2 for cmsd.
**[CMake]** Add an option to build with asan.
**[Docker]** Add docker imgs with centos 7/8 build env.
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