hg: jdk10/sandbox/jdk: http-client-branch: initial commit of SynchronousPublisher (from a private repo, rev. 1fb7d06ab32a2a9df912f4189ac439380f516baf)

[pavel.rappo at oracle.com]

Changeset: 59e9e8a82c5d
Author:    prappo
Date:      2017-10-17 10:36 +0100
URL:       http://hg.openjdk.java.net/jdk10/sandbox/jdk/rev/59e9e8a82c5d

http-client-branch: initial commit of SynchronousPublisher (from a private repo, rev. 1fb7d06ab32a2a9df912f4189ac439380f516baf)

+ src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/common/SynchronousPublisher.java
+ src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/common/TemporarySubscription.java