pdnsutil {add-record,delete-rrset}: Don't append ZONE if NAME ends wi…

…th .

If a NAME ends with a . it is to be understood as an absolute name and
appending the zone is not intuitive then.

Note this changes behaviour for calls like:

	pdnsutil --config-dir=configs/auth add-record example.net . NS 1.2.3.4

which added the NS record to the zone's apex before and is likely an
error now.

Closes: PowerDNS#8595

pdns/pdnsutil.cc

@@ -1599,6 +1599,8 @@ static int addOrReplaceRecord(bool addOrReplace, const vector<string>& cmds) {
   DNSName name;
   if (cmds.at(2) == "@")
     name=zone;
+  else if (isCanonical(cmds.at(2)))
+    name = DNSName(cmds.at(2));
   else
     name = DNSName(cmds.at(2)) + zone;
 
@@ -1737,6 +1739,8 @@ static int deleteRRSet(const std::string& zone_, const std::string& name_, const
   DNSName name;
   if(name_=="@")
     name=zone;
+  else if (isCanonical(name_))
+    name = DNSName(name_);
   else
     name=DNSName(name_)+zone;