doc: improve escape description (#4074)

docs/en/reference/how_to_set_up_metadata_engine.md

@@ -200,6 +200,8 @@ juicefs format \
 1. JuiceFS uses public [schema](https://www.postgresql.org/docs/current/ddl-schemas.html) by default, if you want to use a `non-public schema`,  you need to specify `search_path` in the connection string parameter. e.g `postgres://user:[email protected]:5432/juicefs?search_path=pguser1`
 2. If the `public schema` is not the first hit in the `search_path` configured on the PostgreSQL server, the `search_path` parameter must be explicitly set in the connection string.
 3. The `search_path` connection parameter can be set to multiple schemas natively, but currently JuiceFS only supports setting one. `postgres://user:[email protected]:5432/juicefs?search_path=pguser1,public` will be considered illegal.
+4. Special characters in the password need to be replaced by url encoding. For example, `|` needs to be replaced with `%7C`.
+
 :::
 
 ### Mount a file system
@@ -255,7 +257,10 @@ mysql://<username>[:<password>]@unix(<socket-file-path>)/<database-name>
 </Tabs>
 
 :::note
-Don't leave out the `()` brackets on either side of the URL.
+
+1. Don't leave out the `()` brackets on either side of the URL.
+2. Special characters in passwords do not require url encoding
+
 :::
 
 For example:

docs/zh_cn/reference/how_to_set_up_metadata_engine.md

@@ -200,6 +200,8 @@ juicefs format \
 1. JuiceFS 默认使用的 public [schema](https://www.postgresql.org/docs/current/ddl-schemas.html) ，如果要使用非 `public schema`，需要在连接字符串中指定 `search_path` 参数，例如 `postgres://user:[email protected]:5432/juicefs?search_path=pguser1`
 2. 如果 `public schema` 并非是 PostgreSQL 服务端配置的 `search_path` 中第一个命中的，则必须在连接字符串中明确设置 `search_path` 参数
 3. `search_path` 连接参数原生可以设置为多个 schema，但是目前 JuiceFS 仅支持设置一个。`postgres://user:[email protected]:5432/juicefs?search_path=pguser1,public` 将被认为不合法
+4. 密码中的特殊字符需要进行 url 编码，例如 `|` 需要编码为`%7C`。
+
 :::
 
 ### 挂载文件系统
@@ -255,7 +257,10 @@ mysql://<username>[:<password>]@unix(<socket-file-path>)/<database-name>
 </Tabs>
 
 :::note 注意
-不要漏掉 URL 两边的 `()` 括号
+
+1. 不要漏掉 URL 两边的 `()` 括号
+2. 密码中的特殊字符不需要进行 url 编码
+
 :::
 
 例如：