Fix a couple of doc comment references - and many spelling mistakes

sdk/lib/io/secure_socket.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 /**
  * A high-level class for communicating securely over a TCP socket, using
  * TLS and SSL. The [SecureSocket] exposes both a [Stream] and an
  * [IOSink] interface, making it ideal for using together with
@@ skipping 12 matching lines @@
    * The default SecurityContext object contains a built-in set of trusted
    * root certificates for well-known certificate authorities.
    *
    * [onBadCertificate] is an optional handler for unverifiable certificates.
    * The handler receives the [X509Certificate], and can inspect it and
    * decide (or let the user decide) whether to accept
    * the connection or not.  The handler should return true
    * to continue the [SecureSocket] connection.
    *
    * [supportedProtocols] is an optional list of protocols (in decreasing
-   * order of preference) to use during the ALPN protocol negogiation with the
+   * order of preference) to use during the ALPN protocol negotiation with the
    * server.  Example values are "http/1.1" or "h2".  The selected protocol
    * can be obtained via [SecureSocket.selectedProtocol].
    */
   static Future<SecureSocket> connect(host, int port,
       {SecurityContext context,
       bool onBadCertificate(X509Certificate certificate),
       List<String> supportedProtocols}) {
     return RawSecureSocket
         .connect(host, port,
             context: context,
@@ skipping 136 matching lines @@
    * [SecurityContext.usePrivateKey], and the server asks for a client
    * certificate, then that client certificate is sent to the server.
    *
    * [onBadCertificate] is an optional handler for unverifiable certificates.
    * The handler receives the [X509Certificate], and can inspect it and
    * decide (or let the user decide) whether to accept
    * the connection or not.  The handler should return true
    * to continue the [RawSecureSocket] connection.
    *
    * [supportedProtocols] is an optional list of protocols (in decreasing
-   * order of preference) to use during the ALPN protocol negogiation with the
+   * order of preference) to use during the ALPN protocol negotiation with the
    * server.  Example values are "http/1.1" or "h2".  The selected protocol
    * can be obtained via [RawSecureSocket.selectedProtocol].
    */
   static Future<RawSecureSocket> connect(host, int port,
       {SecurityContext context,
       bool onBadCertificate(X509Certificate certificate),
       List<String> supportedProtocols}) {
     _RawSecureSocket._verifyFields(
         host, port, false, false, false, onBadCertificate);
     return RawSocket.connect(host, port).then((socket) {
@@ skipping 1028 matching lines @@
 
 /**
  * An exception that happens in the handshake phase of establishing
  * a secure network connection, when looking up or verifying a
  * certificate.
  */
 class CertificateException extends TlsException {
   const CertificateException([String message = "", OSError osError = null])
       : super._("CertificateException", message, osError);
 }