Revert "Partial revert of PR #4911 (#4939)"

This reverts commit c71d70c.

Author: glpatcern

changelog/unreleased/undo-gw-refactoring.md

@@ -71,6 +71,7 @@ type config struct {
 	EtagCacheTTL        int                               `mapstructure:"etag_cache_ttl"`
 	AllowedUserAgents   map[string][]string               `mapstructure:"allowed_user_agents"` // map[path][]user-agent
 	CreateHomeCacheTTL  int                               `mapstructure:"create_home_cache_ttl"`
+	HomeLayout          string                            `mapstructure:"home_layout"`
 }
 
 // sets defaults.
@@ -111,6 +112,11 @@ func (c *config) ApplyDefaults() {
 	if c.TransferExpires == 0 {
 		c.TransferExpires = 100 * 60 // seconds
 	}
+
+	// default to /home
+	if c.HomeLayout == "" {
+		c.HomeLayout = "/home"
+	}
 }
 
 type svc struct {