kdc: remove auth_event_details audit key

The auth event details audit key (formerly, parameter to auth_status)
contained, variously, an encryption type name; a PKINIT client certificate
name; or, a GSS initiator name. Audit these instead using individual keys that
reflect the values' contents.

lib/base/version-script.map

@@ -34,7 +34,6 @@ HEIMDAL_BASE_1.0 {
 		heim_audit_addkv_object;
 		heim_audit_addkv_timediff;
 		heim_audit_addreason;
-		heim_audit_delkv;
 		heim_audit_getkv;
 		heim_audit_trail;
 		heim_audit_vaddkv;