go simple proxy

可以建立简单的隧道代理。所有的代理可以放到文件或者redis set中，使用时随机取一个。
可以直接使用已经构建好的releases/proxy(mac m1)、proxy_linux_amd64、proxy_linux_arm64

注意：文件或者redis set只能选其一

dev

```
go run ./cmd/proxy/*.go
```

build

```
make proxy
```

docker

redis
```shell
docker run -d --name redis -p 6377:6379 redis --requirepass "password"
```
```
redis-cli -p 6377 -a password
```

use

* -s 设置是否server，默认false（client）
* -v 调试模式（显示文件行数）
* -q 安静模式（无输出）
* -ph set proxy host，default ":8081"
* -pf set proxy file，default ""
* -rh set redis host，default "127.0.0.1:6379"
* -rp set redis password，default ""
* -rd set redis db，default 0
* -rk set redis key，default ""

client
```
go run ./cmd/proxy/*.go -v -ph "//user2:password2@:8082"
go run ./cmd/proxy/*.go -v -ph "//user3:password3@:8083"

# add into redis
./releases/proxy -ph "//user5:password5@" -rh "127.0.0.1:6377" -rp "password" -rd 0 -rk "proxies"
```

server
```
# read from file
go run ./cmd/proxy/*.go -v -s -ph "//user1:password1@" -pf ".proxies"

# read from redis
./releases/proxy -v -s -ph "//user:password@" -rh "127.0.0.1:6377" -rp "password" -rd 0 -rk "proxies"
```

test

```
curl -x 127.0.0.1:8080 https://cip.cc
curl --http1.0 -x user1:password1@127.0.0.1:8081 http://cip.cc

# with auth
curl -x user1:password1@127.0.0.1:8081 http://cip.cc
```

TODO

* https proxy
* check same host proxy
* only server read proxy file
* docker support
* http1.0 / http1.1
* http2 support
* Keep-Alive support

赞赏