fix(i18n): rm double quotes in i18n confs, add missing translation

apps/emqx/i18n/emqx_schema_i18n.conf

@@ -618,7 +618,7 @@ mqtt 下所有的配置作为全局的默认值存在，它可以被 <code>zone<
 
     mqtt_max_clientid_len {
         desc {
-            en: """"Maximum allowed length of MQTT clientId."""
+            en: """Maximum allowed length of MQTT clientId."""
             zh: """允许的最大 MQTT Client ID 长度"""
         }
     }
@@ -824,7 +824,7 @@ Only works for the TLS connection."""
 
     broker {
         desc {
-            en: """"Message broker options."""
+            en: """Message broker options."""
             zh: """Broker 相关配置项。"""
         }
     }

apps/emqx_authz/i18n/emqx_authz_schema_i18n.conf

@@ -20,18 +20,35 @@ NOTE:
 The source elements are identified by their 'type'.
 It is NOT allowed to configure two or more sources of the same type.
 """
-      zh: """"""
+      zh: """
+鉴权数据源.<br>
+鉴权(ACL)数据源的列表.
+它被设计为一个数组,而不是一个散列映射,
+所以可以作为链式访问控制.<br>
+
+当授权一个 'publish' 或 'subscribe' 行为时,
+该配置列表中的所有数据源将按顺序进行检查。
+如果在某个客户端未找到时(使用 ClientID 或 Username),
+将会移动到下一个数据源. 直至得到 'allow' 或 'deny' 的结果.<br>
+
+如果在任何数据源中都未找到对应的客户端信息,
+配置的默认行为 ('authorization.no_match') 将生效.<br>
+
+注意:
+数据源使用 'type' 进行标识.
+使用同一类型的数据源多于一次不被允许.
+"""
     }
     label {
       en: """sources"""
-      zh: """"""
+      zh: """数据源"""
     }
   }
 
   authorization {
     desc {
       en: """Configuration related to the client authorization."""
-      zh: """"""
+      zh: """客户端授权相关配置"""
     }
     label {
       en: """authorization"""

apps/emqx_dashboard/i18n/emqx_dashboard_schema.conf

@@ -17,7 +17,7 @@ but use the same port."""
   }
   sample_interval {
     desc {
-      en: """How often to update metrics displayed in the dashboard.<br/>"
+      en: """How often to update metrics displayed in the dashboard.<br/>
 Note: `sample_interval` should be a divisor of 60."""
       zh: """更新仪表板中显示的指标的时间间隔。"""
     }
@@ -154,7 +154,7 @@ Note: `sample_interval` should be a divisor of 60."""
   }
   default_password {
     desc {
-      en: """The initial default password for dashboard 'admin' user.<br>"
+      en: """The initial default password for dashboard 'admin' user.<br>
 For safety, it should be changed as soon as possible."""
       zh: """默认的仪表板用户密码<br>
 为了安全，应该尽快修改密码。"""

apps/emqx_gateway/i18n/emqx_coap_api_i18n.conf

@@ -16,7 +16,7 @@ emqx_coap_api {
 
     method {
         desc {
-            en: """"Request method type"""
+            en: """Request method type"""
             zh: """请求 Method 类型"""
         }
     }
@@ -30,7 +30,7 @@ emqx_coap_api {
 
     content_type {
         desc {
-            en: """"Payload type" """
+            en: """Payload type"""
             zh: """Payload 类型"""
         }
     }

apps/emqx_gateway/i18n/emqx_gateway_schema_i18n.conf

@@ -220,7 +220,7 @@ For example, after receiving an update message from a client, any messages withi
 
     lwm2m_update_msg_publish_condition {
         desc {
-            en: """"Policy for publishing UPDATE event message.
+            en: """Policy for publishing UPDATE event message.
   - always: send update events as long as the UPDATE request is received.
   - contains_object_list: send update events only if the UPDATE request carries any Object List
 """