vendor: update all dependencies

vendor/github.com/aws/aws-sdk-go/service/rds/rdsutils/connect.go

@@ -12,11 +12,10 @@ import (
 // BuildAuthToken will return a authentication token for the database's connect
 // based on the RDS database endpoint, AWS region, IAM user or role, and AWS credentials.
 //
-// Endpoint consists of the scheme, hostname, and port. IE scheme://{hostname}[:port]
-// of the RDS database. Region is the AWS region the RDS database is in and where
-// the authentication token will be generated for. DbUser is the IAM user or role
-// the request will be authenticated for. The creds is the AWS credentials
-// the authentication token is signed with.
+// Endpoint consists of the hostname and port, IE hostname:port, of the RDS database.
+// Region is the AWS region the RDS database is in and where the authentication token
+// will be generated for. DbUser is the IAM user or role the request will be authenticated
+// for. The creds is the AWS credentials the authentication token is signed with.
 //
 // An error is returned if the authentication token is unable to be signed with
 // the credentials, or the endpoint is not a valid URL.
@@ -38,6 +37,11 @@ import (
 // See http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/UsingWithRDS.IAMDBAuth.html
 // for more information on using IAM database authentication with RDS.
 func BuildAuthToken(endpoint, region, dbUser string, creds *credentials.Credentials) (string, error) {
+	// the scheme is arbitrary and is only needed because validation of the URL requires one.
+	if !(strings.HasPrefix(endpoint, "http://") || strings.HasPrefix(endpoint, "https://")) {
+		endpoint = "https://" + endpoint
+	}
+
 	req, err := http.NewRequest("GET", endpoint, nil)
 	if err != nil {
 		return "", err