+ **Major bug fixes**
**[XrdHttp]** Fix segfault with macaroons (issue 2114)
**[XrdPss]** Fix segfault if pss.origin uses https protocol with no port (issue 2140)
+ **Minor bug fixes**
**[CMake]** Fix include path in XRootDConfig.cmake (2142)
**[Headers]** Fix header dependencies and missing includes/declarations (2119)
**[Server]** Initialize pidFN to pidpath base directory if an error occurs
**[XrdCl]** Don't try to enable TCP_CORK in GNU/Hurd (2115)
**[XrdCl]** Reapply fix for null-characters in error output (2138, issue 1501)
**[XrdEc]** Fix alignment issues on SPARC (issue 2131)
**[XrdHttp,XrdNet]** Adapt Scitag min and max value to change in spec (2139)
**[XrdSciTokens]** Initialize SecEntity.addrInfo to avoid SEGV (2128)
**[XrdTls]** Switch from using a cert file to a cert chain file (issue 2126)
+ **Miscellaneous**
**[CMake]** Install CMake config file into lib/lib64 rather than share (2116)
**[DEB/RPM]** Rewrite packaging for Debian and RHEL based distributions
**[Tests]** Convert tests to GoogleTest and run without containers (2055, CERN Summer Student Project 2023)
**[Tests]** Other fixes and improvements to tests (2115, 2129, 2130, 2137, 2141)
+ **Known Issues**
**[XrdSciTokens]** In this release, as in previous ones, using scitokens with the ZTN
protocol may grant more access than should be allowed by the token scopes (issue 2121).
**Full Changelog**: https://github.com/xrootd/xrootd/compare/v5.6.3...v5.6.4