add some options.

docs/configuration.md

@@ -95,6 +95,10 @@ hide:
 | serve-expired-prefetch-time | 过期缓存预查询时间 | 28800 | 秒，到达对应超时时间后预查询时间 | serve-expired-prefetch-time 86400 |
 | dualstack-ip-selection | 双栈 IP 优选 | yes | [yes\|no] | dualstack-ip-selection yes |
 | dualstack-ip-selection-threshold | 双栈 IP 优选阈值 | 10ms | 单位为毫秒（ms） | dualstack-ip-selection-threshold [0-1000] |
+| no-pidfile|不创建PID文件 | no | [yes\|no] | no-pidfile yes
+| no-daemon|以前台方式运行程序 | no | [yes\|no] | no-daemon yes
+| restart-on-crash|进程异常时自动重启| no | [yes\|no] | restart-on-crash yes
+| socket-buff-size|套接字缓存大小 | size | 0~1MB | socket-buff-size 256K
 | user | 进程运行用户 | root | user [username] | user nobody |
 | ca-file | 证书文件 | /etc/ssl/<br />certs/ca-certificates.crt | 合法路径字符串 | ca-file /etc/ssl/certs/ca-certificates.crt |
 | ca-path | 证书文件路径 | /etc/ssl/certs | 合法路径字符串 | ca-path /etc/ssl/certs |

docs/index.md

@@ -17,7 +17,7 @@ SmartDNS 同时支持指定特定域名 IP 地址，并高性匹配，可达到
 
 ## 特性
 
-1. **多虚拟DNS服务器**
+1. **多虚拟DNS服务器**  
    支持多个虚拟DNS服务器，不同虚拟DNS服务器不同的端口，规则，客户端。
 
 1. **多 DNS 上游服务器**  

en/docs/configuration.md

@@ -91,6 +91,10 @@ hide:
 |serve-expired-prefetch-time| Prefetch time when serve expired | 28800 | second，prefetch time | serve-expired-prefetch-time 86400 |
 |dualstack-ip-selection|Dualstack ip selection|yes|[yes\|no]|dualstack-ip-selection yes
 |dualstack-ip-selection-threshold|Dualstack ip select thresholds|10ms|millisecond|dualstack-ip-selection-threshold [0-1000]
+|no-pidfile|no create pid file | no | [yes\|no] | no-pidfile yes
+|no-daemon|no run as daemon | no | [yes\|no] | no-daemon yes
+|restart-on-crash|restart when service crash | no | [yes\|no] | restart-on-crash yes
+|socket-buff-size|socket buffer size | size | 0~1MB | socket-buff-size 256K
 |user|run as user|root|user [username]|user nobody
 |ca-file|certificate file|/etc/ssl/certs/<br />ca-certificates.crt|path|ca-file /etc/ssl/certs/ca-certificates.crt
 |ca-path|certificates path|/etc/ssl/certs|path|ca-path /etc/ssl/certs