hg: jdk/sandbox: http-client-branch: remove remaining vestiges of MultiSubscriber and minor doc cleanup

[chris.hegarty at oracle.com]

Changeset: 544869ae0b16
Author:    chegar
Date:      2018-02-06 19:26 +0000
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/544869ae0b16

http-client-branch: remove remaining vestiges of MultiSubscriber and minor doc cleanup

! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpClient.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpRequest.java