Compatibility with 18 beta1 (patroni#3398)

ssl_ecdh_curve was removed.

Followup on patroni#3394

Co-authored-by: Jorge Solórzano <[email protected]>

Author: CyberDem0n

patroni/postgresql/available_parameters/0_postgres.yml

@@ -1426,6 +1426,7 @@ parameters:
   ssl_ecdh_curve:
   - type: String
     version_from: 90400
+    version_till: 180000
   ssl_groups:
   - type: String
     version_from: 180000