hg: jdk10/sandbox/jdk: http-client-branch: make HttpRequest and HttpHeaders concrete value types. Small HttpResponse.MultiSubscriber refactor

[michael.x.mcmahon at oracle.com]

Changeset: 38fbf79a7e74
Author:    michaelm
Date:      2017-10-31 19:32 +0000
URL:       http://hg.openjdk.java.net/jdk10/sandbox/jdk/rev/38fbf79a7e74

http-client-branch: make HttpRequest and HttpHeaders concrete value types. Small HttpResponse.MultiSubscriber refactor

! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpHeaders.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpRequest.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpResponse.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ImmutableHeaders.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/PushGroup.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ResponseHeaders.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/ResponseSubscribers.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/Stream.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/common/HttpHeadersImpl.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/common/MinimalFuture.java
+ test/java/net/httpclient/HeadersTest2.java