Update to 2.1.7
    
     - OPENDNSSEC-949: Fix for migration bug not keeping proper parameters
       of NSEC3 signed zones. Amongst others the zone become NSEC. Loading
       the policies fixes the situation, migration scripts now corrected. Since
       1.4 does not require a salt, a resalt might be automatic after
       migrating, as this is a required parameter.
    
     - OPENDNSSEC-948: do not recreate signatures for keys that are moving
       out this fixes unexpected double signatures in the zone.
    
     - SUPPORT-253: Incorrect keytag used when using Combined Signing keys
       (CSK) (Thanks to Simon Arlott)
    
     - SUPPORT-257: Export keys by locator (Thansk to Simon Arlott)
    
     - SUPPORT-222: Support ED25519/ED448 keys. This requires library ldns
       1.7.0 or better, otherwise unavailable. (Thanks again to Simon
       Arlott)
    
     - Load libsqlite3.so.0 and fall back on libsqlite3.so.0 to allow to run
       migration tool on systems without libsqlite3.so.0 soft link. (Thanks
       to Paul Wouters)
    
     - Some compilation warnings, o.a. gcc10 related, code quality and
       initialization improvements. (Thanks to Jonas Berlin, and Mathieu
       MirMont, and Paul Wouters)