Support socks5 proxy

[TeslaCN]

Do you want to request a feature or report a bug?

What is the current behavior?

I configured a socks5 proxy in my .m2/settings.xml

    <proxy>
      <id>v2ray-socks5</id>
      <active>true</active>
      <protocol>socks5</protocol>
      <username></username>
      <password></password>
      <host>127.0.0.1</host>
      <port>1089</port>
      <nonProxyHosts>localhost|maven.aliyun.com</nonProxyHosts>
    </proxy>

But the plugin use http protocol on this socks5 proxy.

[INFO] Downloading via proxy v2ray{protocol='socks5', host='127.0.0.1', port=1089, nonProxyHosts='localhost|maven.aliyun.com'}
Jul 11, 2021 11:07:38 AM org.apache.http.impl.execchain.RetryExec execute
INFO: I/O exception (org.apache.http.NoHttpResponseException) caught when processing request to {tls}->http://127.0.0.1:1089->https://nodejs.org:443: The target server failed to respond
INFO: Retrying request to {tls}->http://127.0.0.1:1089->https://nodejs.org:443
INFO: I/O exception (org.apache.http.NoHttpResponseException) caught when processing request to {tls}->http://127.0.0.1:1089->https://nodejs.org:443: The target server failed to respond
Jul 11, 2021 11:07:38 AM org.apache.http.impl.execchain.RetryExec execute
INFO: Retrying request to {tls}->http://127.0.0.1:1089->https://nodejs.org:443
Jul 11, 2021 11:07:39 AM org.apache.http.impl.execchain.RetryExec execute
INFO: I/O exception (org.apache.http.NoHttpResponseException) caught when processing request to {tls}->http://127.0.0.1:1089->https://nodejs.org:443: The target server failed to respond
Jul 11, 2021 11:07:39 AM org.apache.http.impl.execchain.RetryExec execute
INFO: Retrying request to {tls}->http://127.0.0.1:1089->https://nodejs.org:443

I changed the protocol to http in .m2/settings.xml and the download succeed.

If the current behavior is a bug, please provide the steps to reproduce.

What is the expected behavior? Use the right protocol in proxy.

Please mention your frontend-maven-plugin and operating system version. macOS 11.4 with Apple M1 Plugin version: 1.12.0