m_captcha bump and gc config in settings

src/data.rs

@@ -52,7 +52,7 @@ impl Data {
             .build()
             .unwrap();
 
-        let master = Master::new().start();
+        let master = Master::new(SETTINGS.pow.gc).start();
         let cache = HashCache::default().start();
         let pow = PoWConfigBuilder::default()
             .salt(SETTINGS.pow.salt.clone())

src/settings.rs

@@ -34,6 +34,7 @@ pub struct Server {
 #[derive(Debug, Clone, Deserialize)]
 pub struct Captcha {
     pub salt: String,
+    pub gc: u64,
 }
 
 impl Server {