Please provide the following information when submitting an issue (feature requests or general comments can skip this):

1. pgBackRest version:2.47

2. PostgreSQL version:12

3. Describe the issue:
   Hello, I see that pgbackrest currently only supports https protocol, is there any relevant option for users to choose, or can users release the restrictions by changing the underlying code? If yes, could you please inform us of the location for modification? Thank you very much.