Merge branch 'develop' into 'master'

Add support for inner site search

See merge request codechina_dev/git2!23

data/search.json

 [
+  {
+    "name": "站内",
+    "icon": "https://raw.sevencdn.com/xjh22222228/nav/image/logo.png",
+    "placeholder": "站内搜索",
+    "blocked": false,
+    "isInner": true
+  },
   {
     "name": "CSDN",
     "url": "https://so.csdn.net/so/search?q=",
     "icon": "https://img-operation.csdnimg.cn/csdn/silkroad/img/1607569811165.png",
     "placeholder": "CSDN搜索",
     "blocked": false
-  },
-  {
-    "name": "百度",
-    "url": "https://www.baidu.com/s?wd=",
-    "icon": "https://raw.sevencdn.com/xjh22222228/nav/image/baidu.svg",
-    "placeholder": "百度一下",
-    "blocked": false
-  },
-  {
-    "name": "Google",
-    "url": "https://www.google.com/search?q=",
-    "icon": "https://raw.sevencdn.com/xjh22222228/nav/image/google.svg",
-    "blocked": false
-  },
-  {
-    "name": "必应",
-    "url": "https://cn.bing.com/search?q=",
-    "icon": "https://raw.sevencdn.com/xjh22222228/nav/image/bing.svg",
-    "blocked": false
-  },
-  {
-    "name": "GitHub",
-    "url": "https://github.com/search?q=",
-    "icon": "https://raw.sevencdn.com/xjh22222228/nav/image/github.svg",
-    "placeholder": "Search GitHub",
-    "blocked": false
   }
 ]
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