Summary
-------
Add conventional constructors that take a cause to `SocketException` to avoid the need to call `initCause` as part of creating the exception.

Problem
-------

The creation of many `SocketException`s involves setting the cause, but the set of constructors does not include any ones taking a cause.

Solution
--------

Add the two missing conventional constructors that take a cause argument.

Specification
-------------

    --- a/src/java.base/share/classes/java/net/SocketException.java
    +++ b/src/java.base/share/classes/java/net/SocketException.java
    @@ -1,5 +1,5 @@
     /*
    - * Copyright (c) 1995, 2019, Oracle and/or its affiliates. All rights reserved.
    + * Copyright (c) 1995, 2022, Oracle and/or its affiliates. All rights reserved.
      * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
      *
      * This code is free software; you can redistribute it and/or modify it
    @@ -52,4 +52,27 @@ public class SocketException extends IOException {
          */
         public SocketException() {
         }
    +
    +    /**
    +     * Constructs a new {@code SocketException} with the
    +     * specified detail message and cause.
    +     *
    +     * @param msg the detail message.
    +     * @param cause the cause
    +     * @since 19
    +     */
    +    public SocketException(String msg, Throwable cause) {
    +        super(msg, cause);
    +    }
    +
    +    /**
    +     * Constructs a new {@code SocketException} with the
    +     * specified cause.
    +     *
    +     * @param cause the cause
    +     * @since 19
    +     */
    +    public SocketException(Throwable cause) {
    +        super(cause);
    +    }
     }