[apisix] branch master updated: docs: clarify the default value of Upstream.pass_host (#3468)

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The following commit(s) were added to refs/heads/master by this push:
     new dffc517  docs: clarify the default value of Upstream.pass_host (#3468)
dffc517 is described below

commit dffc5178a15b1677894d7630f114a465e0a214ed
Author: 罗泽轩 <sp...@gmail.com>
AuthorDate: Mon Feb 1 19:22:20 2021 +0800

    docs: clarify the default value of Upstream.pass_host (#3468)
    
    Fix #2134
---
 doc/admin-api.md       | 2 +-
 doc/zh-cn/admin-api.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/admin-api.md b/doc/admin-api.md
index 29eae70..f1cc0c5 100644
--- a/doc/admin-api.md
+++ b/doc/admin-api.md
@@ -522,7 +522,7 @@ In addition to the basic complex equalization algorithm selection, APISIX's Upst
 |timeout|optional| Set the timeout for connection, sending and receiving messages. |
 |name     |optional|Identifies upstream names|
 |desc     |optional|upstream usage scenarios, and more.|
-|pass_host            |optional|`pass` pass the client request host, `node` not pass the client request host, using the upstream node host, `rewrite` rewrite host by the configured `upstream_host`.|
+|pass_host            |optional|`pass` pass the client request host, `node` not pass the client request host, using the upstream node host, `rewrite` rewrite host by the configured `upstream_host`. Default to `pass`.|
 |upstream_host    |optional|This option is only valid if the `pass_host` is `rewrite`.|
 |scheme|optional |The scheme used when talk with the upstream. The value is one of ['http', 'https', 'grpc', 'grpcs'], default to 'http'.|
 |labels|optional |Key/value pairs to specify attributes|{"version":"v2","build":"16","env":"production"}|
diff --git a/doc/zh-cn/admin-api.md b/doc/zh-cn/admin-api.md
index 771b072..024550d 100644
--- a/doc/zh-cn/admin-api.md
+++ b/doc/zh-cn/admin-api.md
@@ -531,7 +531,7 @@ APISIX 的 Upstream 除了基本的复杂均衡算法选择外，还支持对上
 |hash_on         |可选|辅助|`hash_on` 支持的类型有 `vars`（Nginx内置变量），`header`（自定义header），`cookie`，`consumer`，默认值为 `vars`|
 |name     |可选 |辅助|标识上游服务名称、使用场景等。||
 |desc     |可选 |辅助|上游服务描述、使用场景等。||
-|pass_host            |可选|枚举|`pass` 透传客户端请求的 host, `node` 不透传客户端请求的 host, 使用 upstream node 配置的 host, `rewrite` 使用 `upstream_host` 配置的值重写 host 。||
+|pass_host            |可选|枚举|`pass` 透传客户端请求的 host, `node` 不透传客户端请求的 host, 使用 upstream node 配置的 host, `rewrite` 使用 `upstream_host` 配置的值重写 host 。默认为 `pass`。||
 |upstream_host    |可选|辅助|只在 `pass_host` 配置为 `rewrite` 时有效。||
 |scheme|可选 |辅助|跟上游通信时使用的 scheme。需要是 ['http', 'https', 'grpc', 'grpcs'] 其中的一个，默认是 'http'。|
 |labels   |可选 |匹配规则|标识附加属性的键值对|{"version":"v2","build":"16","env":"production"}|