[dnssec] KASP zone API: unify naming
[dnssec] zone list: clean use of dnssec_list_free_full
update to slightly modified DNSSEC API
[dnssec] KASP: add API for key status
[dnssec] KASP: key removal API header
[dnssec] keymgr: implement save zone removal
[dnssec] KASP: internal API naming unification
[dnssec] shared: add dname_ascii_normalize_copy()
[dnssec] KASP zone removal: connect internal and external API
[dnssec] KASP dir backend: implement zone removal