hg: jdk10/sandbox/jdk: http-client-branch: improve HttpClientImpl ref counting assertions

[daniel.fuchs at oracle.com]

Changeset: 3aa0d683bf0b
Author:    dfuchs
Date:      2017-09-18 14:25 +0100
URL:       http://hg.openjdk.java.net/jdk10/sandbox/jdk/rev/3aa0d683bf0b

http-client-branch: improve HttpClientImpl ref counting assertions

! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpClientImpl.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/PlainHttpConnection.java