patch certbot_dns_ovh to follow CNAME

certbot_dns_ovh.py.patch

--- certbot_dns_ovh/_internal/dns_ovh.py.orig   2023-03-27 12:48:43.913613478 +0000
+++ certbot_dns_ovh/_internal/dns_ovh.py        2023-03-27 13:20:36.651115194 +0000
@@ -7,6 +7,8 @@
 from lexicon.providers import ovh
 from requests import HTTPError

+import dns.resolver
+
 from certbot import errors
 from certbot.plugins import dns_common
 from certbot.plugins import dns_common_lexicon
@@ -29,6 +31,8 @@
     def __init__(self, *args: Any, **kwargs: Any) -> None:
         super().__init__(*args, **kwargs)
         self.credentials: Optional[CredentialsConfiguration] = None
+        self.resolver = dns.resolver.Resolver(configure = False)
+        self.resolver.nameservers = ["8.8.8.8"]

     @classmethod
     def add_parser_arguments(cls, add: Callable[..., None],
@@ -54,12 +58,14 @@
                 .format(TOKEN_URL),
             }
         )
-
+
     def _perform(self, domain: str, validation_name: str, validation: str) -> None:
-        self._get_ovh_client().add_txt_record(domain, validation_name, validation)
+        validation_name = self.resolver.canonical_name(validation_name).to_text().rstrip(".")
+        self._get_ovh_client().add_txt_record(validation_name, validation_name, validation)

     def _cleanup(self, domain: str, validation_name: str, validation: str) -> None:
-        self._get_ovh_client().del_txt_record(domain, validation_name, validation)
+        validation_name = self.resolver.canonical_name(validation_name).to_text().rstrip(".")
+        self._get_ovh_client().del_txt_record(validation_name, validation_name, validation)

     def _get_ovh_client(self) -> "_OVHLexiconClient":
         if not self.credentials:  # pragma: no cover