hg: jdk/sandbox: 8204303: Add redirect for overview-summary.html

[chris.hegarty at oracle.com]

Changeset: 505d944de3c5
Author:    jjg
Date:      2018-06-06 15:10 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/505d944de3c5

8204303: Add redirect for overview-summary.html
Reviewed-by: sundar, hannesw

! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/HtmlDoclet.java
! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/IndexRedirectWriter.java
! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/markup/Head.java
! test/langtools/jdk/javadoc/doclet/testFramesNoFrames/TestFramesNoFrames.java