v5.3.4-r11

• bfc5443 luci-app-mosdns: change default log level to error
• db1cd83 luci-app-mosdns: statistics: add query history chart and refine monitoring dashboard
• 5195464 luci-app-mosdns: rpcd: Add historical query data
• 2e01856 mosdns: use system local timezone for history and log timestamps
• e37ee13 luci-app-mosdns: add statistics page support
• 418415f mosdns: plugin: add stats_api plugin