Update docs

Author: lunny

addrs=127.0.0.1:6379 db=1/000002.ldb

@@ -0,0 +1 @@
+MANIFEST-000004

addrs=127.0.0.1:6379 db=1/CURRENT

@@ -0,0 +1 @@
+MANIFEST-000000

addrs=127.0.0.1:6379 db=1/CURRENT.bak

@@ -0,0 +1,16 @@
+=============== Apr 1, 2021 (CST) ===============
+15:57:07.855990 log@legend F·NumFile S·FileSize N·Entry C·BadEntry B·BadBlock Ke·KeyError D·DroppedEntry L·Level Q·SeqNum T·TimeElapsed
+15:57:07.916404 db@open opening
+15:57:07.917003 version@stat F·[] S·0B[] Sc·[]
+15:57:07.994290 db@janitor F·2 G·0
+15:57:07.994634 db@open done T·78.176316ms
+=============== Apr 1, 2021 (CST) ===============
+15:58:00.907990 log@legend F·NumFile S·FileSize N·Entry C·BadEntry B·BadBlock Ke·KeyError D·DroppedEntry L·Level Q·SeqNum T·TimeElapsed
+15:58:00.909620 version@stat F·[] S·0B[] Sc·[]
+15:58:00.909648 db@open opening
+15:58:00.909720 journal@recovery F·1
+15:58:00.909854 journal@recovery recovering @1
+15:58:00.933564 memdb@flush created L0@2 N·2 S·148B "iss..igh,v2":"iss..low,v1"
+15:58:00.933889 version@stat F·[1] S·148B[148B] Sc·[0.25]
+15:58:01.004032 db@janitor F·3 G·0
+15:58:01.004070 db@open done T·94.413021ms

addrs=127.0.0.1:6379 db=1/LOCK

@@ -961,7 +961,7 @@ And used by `[attachment]`, `[lfs]` and etc. as `STORAGE_TYPE`.
 
 ## Proxy (`proxy`)
 
-- `PROXY_ENABLED`: **true**: Enable the proxy, all requests to external via HTTP will be affected
+- `PROXY_ENABLED`: **true**: Enable the proxy if true, all requests to external via HTTP will be affected, if false, no proxy will be used even environment http_proxy/https_proxy
 - `PROXY_URL`: ****: Proxy server URL, support http://, https//, socks://, blank will follow environment http_proxy/https_proxy
 - `PROXY_HOSTS`: ****: Comma separated list of host names requiring proxy. Glob patterns (*) are accepted; use ** to match all hosts.
 

addrs=127.0.0.1:6379 db=1/LOG

@@ -380,7 +380,7 @@ MINIO_USE_SSL = false
 
 ## Proxy (`proxy`)
 
-- `PROXY_ENABLED`: **true**: 是否启用全局代理
+- `PROXY_ENABLED`: **true**: 是否启用全局代理。如果为否，则不使用代理，环境变量中的代理也不使用
 - `PROXY_URL`: ****: 代理服务器地址，支持 http://, https//, socks://，为空则不启用代理而使用环境变量中的 http_proxy/https_proxy
 - `PROXY_HOSTS`: ****: 逗号分隔的多个需要代理的网址，支持 * 号匹配符号， ** 表示匹配所有网站
 

addrs=127.0.0.1:6379 db=1/MANIFEST-000004

@@ -22,7 +22,10 @@ var (
 
 // SystemProxy returns the system proxy
 func SystemProxy() func(req *http.Request) (*url.URL, error) {
-	if !setting.Proxy.Enabled || setting.Proxy.ProxyURL == "" {
+	if !setting.Proxy.Enabled {
+		return nil
+	}
+	if setting.Proxy.ProxyURL == "" {
 		return http.ProxyFromEnvironment
 	}