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Update queryStrategy parameter explanation (#438)

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* Update queryStrategy parameter explanation

* 更证一处解释

* Update dns.md
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docs/config/dns.md
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@ -56,6 +56,22 @@ Xray 内置的 DNS 模块，主要有两大用途：
"skipFallback": false,
"clientIP": "1.2.3.4"
},
{
"address": "https://1.1.1.1/dns-query",
"domains": [
"geosite:netflix"
],
"skipFallback": true,
"queryStrategy": "UseIPv4"
},
{
"address": "https://1.1.1.1/dns-query",
"domains": [
"geosite:openai"
],
"skipFallback": true,
"queryStrategy": "UseIPv6"
},
"localhost"
],
"clientIp": "1.2.3.4",
@ -132,6 +148,55 @@ Xray 内置的 DNS 模块，主要有两大用途：
`UseIPv4` 只查询 A 记录；`UseIPv6` 只查询 AAAA 记录。默认值为 `UseIP`，即查询 A 和 AAAA 记录。
Xray-core v1.8.6 新增功能：`queryStrategy` 可以在每一项 `DNS` 服务器中分别设置。
```jsonc
"dns": {
"servers": [
"https://1.1.1.1/dns-query",
{
"address": "https://1.1.1.1/dns-query",
"domains": [
"geosite:netflix"
],
"skipFallback": true,
"queryStrategy": "UseIPv4" // geosite:netflix 的域名使用 "UseIPv4"
},
{
"address": "https://1.1.1.1/dns-query",
"domains": [
"geosite:openai"
],
"skipFallback": true,
"queryStrategy": "UseIPv6" // geosite:openai 的域名使用 "UseIPv6"
}
],
"queryStrategy": "UseIP" // 全局使用 "UseIP"
}
```
**注意：**<br>
当子项中的 `"queryStrategy"` 值与全局 `"queryStrategy"` 值冲突时，子项的查询将空响应。
```jsonc
"dns": {
"servers": [
"https://1.1.1.1/dns-query",
{
"address": "https://8.8.8.8/dns-query",
"domains": [
"geosite:netflix"
],
"skipFallback": true,
"queryStrategy": "UseIPv6" // "UseIPv6" 与 "UseIPv4" 冲突
}
],
"queryStrategy": "UseIPv4"
}
```
子项 geosite:netflix 的查询由于 `"queryStrategy"` 值冲突，得到空响应。geosite:netflix 的域名由全局 DNS `https://1.1.1.1/dns-query` 查询，得到 A 记录。
> `disableCache`: true | false
`true` 禁用 DNS 缓存，默认为 `false`，即不禁用。