git: openjdk/jdk: 8288109: HttpExchangeImpl.setAttribute does not allow null value after JDK-8266897

[Daniel Jeliński]

Changeset: f9827ad1
Author:    Daniel Jeliński <djelinski at openjdk.org>
Date:      2023-04-03 14:57:03 +0000
URL:       https://git.openjdk.org/jdk/commit/f9827ad17205ad1cec21bf76f8553f415439b38b

8288109: HttpExchangeImpl.setAttribute does not allow null value after JDK-8266897

Reviewed-by: dfuchs, jpai

! src/jdk.httpserver/share/classes/sun/net/httpserver/ExchangeImpl.java
+ test/jdk/com/sun/net/httpserver/ExchangeAttributeTest.java