These two fields allow to specify a different default assignee for ticket opened against this package in bugzilla. Note: The EPEL field is always displayed for packages in the 'rpms' namespace regardless of whether it is used in bugzilla or not.
libnxz is a zlib-compatible library that uses the NX GZIP Engine available on POWER9 or newer processors in order to provide a faster zlib/gzip compression without using the general-purpose cores.