Update vendored deps, including AWS SDK, openpgp, ftp, ...

vendor/github.com/aws/aws-sdk-go/aws/session/env_config.go

@@ -5,6 +5,7 @@ import (
 	"strconv"
 
 	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/defaults"
 )
 
 // EnvProviderName provides a name of the provider when config is loaded from environment.
@@ -176,6 +177,13 @@ func envConfigLoad(enableSharedConfig bool) envConfig {
 	setFromEnvVal(&cfg.SharedCredentialsFile, sharedCredsFileEnvKey)
 	setFromEnvVal(&cfg.SharedConfigFile, sharedConfigFileEnvKey)
 
+	if len(cfg.SharedCredentialsFile) == 0 {
+		cfg.SharedCredentialsFile = defaults.SharedCredentialsFilename()
+	}
+	if len(cfg.SharedConfigFile) == 0 {
+		cfg.SharedConfigFile = defaults.SharedConfigFilename()
+	}
+
 	cfg.CustomCABundle = os.Getenv("AWS_CA_BUNDLE")
 
 	return cfg