[dnssec] keymgr, extract frequent operations
[dnssec] shared: strtonum, reset errno before conversion
[dnssec] legacy key import, remove testing utility
[dnssec] keymgr, add crypto initilization into main
[dnssec] keymgr, shortcut to add DNSKEY into zone
[dnskey] keymgr, unify way of printing key IDs
[dnssec] keymgr, implement base of 'zone key import'