Bump version to 1.4.2.8
    Issue 50855 - remove unused file from UI
    Issue 50855 - UI: Port Server Tab to React
    Issue 49845 - README does not contain complete information on building
    Issue 49623 - cont cenotaph errors on modrdn operations
    Issue 50882 - Fix healthcheck errors for instances that do not have TLS enabled
    Issue 50886 - Typo in the replication debug message
    Issue 50873 - Fix healthcheck and virtual attr check
    Issue 50873 - Fix issues with healthcheck tool
    Issue 50857 - Memory leak in ACI using IP subject
    Issue 50823 - dsctl doesn't work with 'slapd-' in the instance name
    Issue 49624 - cont - DB Deadlock on modrdn appears to corrupt database and entry cache
    Issue 50850 - Fix dsctl healthcheck for python36
    Issue 49990 - Need to enforce a hard maximum limit for file descriptors