Tweaks docs on secure cookies, fixing issue 1638

tbr: jgw


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5237 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/src/com/google/gwt/user/client/Cookies.java b/user/src/com/google/gwt/user/client/Cookies.java
index 15554ce..81ab03e 100644
--- a/user/src/com/google/gwt/user/client/Cookies.java
+++ b/user/src/com/google/gwt/user/client/Cookies.java
@@ -98,7 +98,8 @@
    * @param expires when the cookie expires
    * @param domain the domain to be associated with this cookie
    * @param path the path to be associated with this cookie
-   * @param secure <code>true</code> to make this a secure cookie
+   * @param secure <code>true</code> to make this a secure cookie (that is,
+   * only accessible over an SSL connection)
    */
   public static void setCookie(String name, String value, Date expires,
       String domain, String path, boolean secure) {