hg: jdk9/sandbox/jdk: JEP-110-branch: make header Lists immutable

[michael.x.mcmahon at oracle.com]

Changeset: 65881f43fef6
Author:    michaelm
Date:      2016-02-18 17:16 +0000
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/65881f43fef6

JEP-110-branch: make header Lists immutable

+ src/java.httpclient/share/classes/java/net/http/HttpHeaders1.java
! src/java.httpclient/share/classes/java/net/http/HttpHeadersImpl.java
! src/java.httpclient/share/classes/java/net/http/HttpRequestImpl.java
! src/java.httpclient/share/classes/java/net/http/HttpResponseImpl.java
! src/java.httpclient/share/classes/java/net/http/ResponseHeaders.java
+ test/java/net/httpclient/ImmutableHeaders.java