Happy Eyeballs support in Socket.ConnectAsync

[liveans]

This API has been proposed and approved on #861.
Since we're closing the mega-issue(#33418) we'll track this here.

class Socket
{
	// existing: public static bool ConnectAsync(SocketType socketType, ProtocolType protocolType, SocketAsyncEventArgs e);
	public static bool ConnectAsync (SocketType socketType, ProtocolType protocolType, SocketAsyncEventArgs e, ConnectAlgorithm connectAlgorithm);
}

// new enum
enum ConnectAlgorithm
{
    // use existing behavior.
    Default,

    // use a Happy Eyeballs-like algorithm to connect.
    Parallel = 1
}

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Issue Details

---

This API has been proposed and approved on #861.
Since we're closing the mega-issue(#33418) we'll track this here.

class Socket
{
	// existing: public static bool ConnectAsync(SocketType socketType, ProtocolType protocolType, SocketAsyncEventArgs e);
	public static bool ConnectAsync (SocketType socketType, ProtocolType protocolType, SocketAsyncEventArgs e, ConnectAlgorithm connectAlgorithm);
}

// new enum
enum ConnectAlgorithm
{
    // use existing behavior.
    Default,

    // use a Happy Eyeballs-like algorithm to connect.
    Parallel = 1
}

Author:	liveans
Assignees:	-
Labels:	api-approved, area-System.Net.Sockets
Milestone:	-

[wfurt]

related to #26177