don't require OpenSSL SNI to pass hostname to ssl functions (#22921)

Patch by Donald Stufft.
diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index c83be2b..9c73f5f 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -747,9 +747,8 @@
                 resp = self.voidcmd('AUTH TLS')
             else:
                 resp = self.voidcmd('AUTH SSL')
-            server_hostname = self.host if ssl.HAS_SNI else None
             self.sock = self.context.wrap_socket(self.sock,
-                                                 server_hostname=server_hostname)
+                                                 server_hostname=self.host)
             self.file = self.sock.makefile(mode='r', encoding=self.encoding)
             return resp
 
@@ -788,9 +787,8 @@
         def ntransfercmd(self, cmd, rest=None):
             conn, size = FTP.ntransfercmd(self, cmd, rest)
             if self._prot_p:
-                server_hostname = self.host if ssl.HAS_SNI else None
                 conn = self.context.wrap_socket(conn,
-                                                server_hostname=server_hostname)
+                                                server_hostname=self.host)
             return conn, size
 
         def abort(self):