hg: jdk10/sandbox/langtools: 8184969: Cannot specify multiple -link to jdk9 javadoc

[chris.hegarty at oracle.com]

Changeset: 20ead224a842
Author:    ksrini
Date:      2017-07-28 15:00 -0700
URL:       http://hg.openjdk.java.net/jdk10/sandbox/langtools/rev/20ead224a842

8184969: Cannot specify multiple -link to jdk9 javadoc
Reviewed-by: jjg

! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/BaseConfiguration.java
! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/util/Extern.java
! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/util/Utils.java
! test/jdk/javadoc/doclet/testLinkOption/TestLinkOption.java
+ test/jdk/javadoc/doclet/testLinkOption/pkg3/A.java