bump version to 1.1.21
    
    - Ticket 47929 - adminutil - future proof getSSLVersion
    - Ticket 47929 - Adminutil - do not use SSL3 by default
    - Ticket 47850 - "nsslapd-allow-anonymous-access: rootdse" makes login as "admin" fail at the first time
    - Ticket 47881 - crash during debug session in adminutil
    - Ticket 47680 - Upgraded 389-admin rpms and now I can't start dirsrv-admin