Cleanup pt 1 (#4)

* Disable startup headers.

* Add banning / unbanning of specific user.

struct_config.go

@@ -21,6 +21,8 @@ type config struct {
 		AccessLog      bool
 		ReadOnlyMode   bool
 		AllowURLs      []string
+		EnableApi      bool
+		ApiPort        int
 	}
 
 	Client struct {
@@ -39,6 +41,10 @@ type config struct {
 		CacheClient *libpack_cache.Cache
 	}
 
+	Api struct {
+		BannedUsersFile string
+	}
+
 	Security struct {
 		BlockIntrospection   bool
 		IntrospectionAllowed []string