vscode-sftp: Can't use .ssh/config alias with HostName

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Describe the bug If I try to connect to a host defined on my .ssh/config when an alias (and a HostName), the plugin replies with: getaddrinfo ENOTFOUND. I can use the same alias with SSH and it works just fine.

To Reproduce Steps to reproduce the behavior:

1. Create an entry in your .ssh/config using a non-address alias as “Host” and the correct server address in “HostName”
2. Configure it on the VSCode SFTP plugin.
3. Try to do anything that uses that SFTP connection.
4. See error.

Expected behavior The plugin should connect correctly when using the SSH_AGENT and the configuration from .ssh/config.

Current SFTP config

{
    "protocol": "sftp",
    "host": "rpi-rsa",
    "port": 22,
    "username": "rpi",
    "remotePath": "/home/pi/Test",
    "agent": "$SSH_AUTH_SOCK"
}

Current .ssh/config section for that Host:

Host rpi-rsa
    HostName XXXXX.XXXXX.XXX
    User pi
    IdentityFile ~/.ssh/id_rsa-personal

Desktop (please complete the following information):

• OS: Tried on Mac and Linux
• VSCode Version 1.29.0
• Extension Version 1.7.5

Extension Logs - required

[info] config at /home/rixzz/Documents/Git/XXXXXXXX {"remotePath":"/home/pi/Test","uploadOnSave":false,"downloadOnOpen":false,"ignore":[],"concurrency":4,"protocol":"sftp","connectTimeout":10000,"interactiveAuth":false,"secure":false,"passive":false,"remoteTimeOffsetInHours":0,"port":22,"host":"rpi-rsa","username":"******","agent":"$SSH_AUTH_SOCK","user":"pi","privatekey":"~/.ssh/id_rsa-personal"}
[trace] run command 'Upload Project'
[trace] handle upload folder for /home/rixzz/Documents/Git/XXXXXXXX
[debug] Local ident: 'SSH-2.0-ssh2js0.2.1'
[debug] Client: Trying rpi-rsa on port 22 ...
[error] Error: [rpi-rsa]: getaddrinfo ENOTFOUND rpi-rsa rpi-rsa:22
	at Client.client.on.on.err (/home/rixzz/.vscode/extensions/liximomo.sftp-1.7.5/out/src/core/remote-client/sshClient.js:229:28)
	at emitOne (events.js:121:20)
	at Client.emit (events.js:211:7)
	at Socket.<anonymous> (/home/rixzz/.vscode/extensions/liximomo.sftp-1.7.5/node_modules/ssh2/lib/client.js:300:10)
	at emitOne (events.js:116:13)
	at Socket.emit (events.js:211:7)
	at emitErrorNT (internal/streams/destroy.js:64:8)
	at _combinedTickCallback (internal/process/next_tick.js:138:11)
	at process._tickCallback (internal/process/next_tick.js:180:9)