Document missing aws config params.

website/source/docs/post-processors/amazon-import.html.md

@@ -61,6 +61,10 @@ Optional:
     launch the imported AMI. By default no additional users other than the user
     importing the AMI has permission to launch it.
 
+-   `custom_endpoint_ec2` (string) - This option is useful if you use a cloud
+    provider whose API is compatible with aws EC2. Specify another endpoint
+    like this `https://ec2.custom.endpoint.com`.
+
 -   `license_type` (string) - The license type to be used for the Amazon Machine
     Image (AMI) after importing. Valid values: `AWS` or `BYOL` (default).
     For more details regarding licensing, see
@@ -70,6 +74,11 @@ Optional:
 -   `mfa_code` (string) - The MFA [TOTP](https://en.wikipedia.org/wiki/Time-based_One-time_Password_Algorithm)
     code. This should probably be a user variable since it changes all the time.
 
+-   `profile` (string) - The profile to use in the shared credentials file for
+    AWS. See Amazon's documentation on [specifying
+    profiles](https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/configuring-sdk.html#specifying-profiles)
+    for more details.
+
 -   `role_name` (string) - The name of the role to use when not using the default role, 'vmimport'
 
 -   `s3_key_name` (string) - The name of the key in `s3_bucket_name` where the
@@ -80,6 +89,9 @@ Optional:
 -   `skip_clean` (boolean) - Whether we should skip removing the OVA file uploaded to S3 after the
     import process has completed. "true" means that we should leave it in the S3 bucket, "false" means to clean it out. Defaults to `false`.
 
+-   `skip_region_validation` (boolean) - Set to true if you want to skip
+    validation of the region configuration option. Default `false`.
+
 -   `tags` (object of key/value strings) - Tags applied to the created AMI and
     relevant snapshots.