Add Configuration to Handle AWS SDK Checksum Changes for Third-Party S3-Compatible Services (#2490)

fix: MissingContentLength error in boto3 version 1.36.1 and up

management/backup.py

@@ -257,6 +257,8 @@ def get_duplicity_env_vars(env):
 	if get_target_type(config) == 's3':
 		env["AWS_ACCESS_KEY_ID"] = config["target_user"]
 		env["AWS_SECRET_ACCESS_KEY"] = config["target_pass"]
+		env["AWS_REQUEST_CHECKSUM_CALCULATION"] = "WHEN_REQUIRED"
+		env["AWS_RESPONSE_CHECKSUM_VALIDATION"] = "WHEN_REQUIRED"
 
 	return env