Bump dnspython from 2.2.0 to 2.2.1 (#1679)

* Bump dnspython from 2.2.0 to 2.2.1

Bumps [dnspython](https://github.com/rthalley/dnspython) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/rthalley/dnspython/releases)
- [Changelog](https://github.com/rthalley/dnspython/blob/master/doc/whatsnew.rst)
- [Commits](https://github.com/rthalley/dnspython/compare/v2.2.0...v2.2.1)

---
updated-dependencies:
- dependency-name: dnspython
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update dnspython==2.2.1

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

[skip ci]

lib/dns/zone.py

@@ -183,6 +183,11 @@ class Zone(dns.transaction.TransactionManager):
                     "name parameter must be a subdomain of the zone origin")
             if self.relativize:
                 name = name.relativize(self.origin)
+        elif not self.relativize:
+            # We have a relative name in a non-relative zone, so derelativize.
+            if self.origin is None:
+                raise KeyError('no zone origin is defined')
+            name = name.derelativize(self.origin)
         return name
 
     def __getitem__(self, key):
@@ -870,11 +875,20 @@ class Version:
 
     def _validate_name(self, name):
         if name.is_absolute():
-            if not name.is_subdomain(self.zone.origin):
+            if self.origin is None:
+                # This should probably never happen as other code (e.g.
+                # _rr_line) will notice the lack of an origin before us, but
+                # we check just in case!
+                raise KeyError('no zone origin is defined')
+            if not name.is_subdomain(self.origin):
                 raise KeyError("name is not a subdomain of the zone origin")
             if self.zone.relativize:
-                # XXXRTH should it be an error if self.origin is still None?
                 name = name.relativize(self.origin)
+        elif not self.zone.relativize:
+            # We have a relative name in a non-relative zone, so derelativize.
+            if self.origin is None:
+                raise KeyError('no zone origin is defined')
+            name = name.derelativize(self.origin)
         return name
 
     def get_node(self, name):
@@ -1030,6 +1044,18 @@ class Transaction(dns.transaction.Transaction):
     def _get_node(self, name):
         return self.version.get_node(name)
 
+    def _origin_information(self):
+        (absolute, relativize, effective) = self.manager.origin_information()
+        if absolute is None and self.version.origin is not None:
+            # No origin has been committed yet, but we've learned one as part of
+            # this txn.  Use it.
+            absolute = self.version.origin
+            if relativize:
+                effective = dns.name.empty
+            else:
+                effective = absolute
+        return (absolute, relativize, effective)
+
 
 def from_text(text, origin=None, rdclass=dns.rdataclass.IN,
               relativize=True, zone_factory=Zone, filename=None,