git: openjdk/jdk: 8263506: Make sun.net.httpserver.UnmodifiableHeaders unmodifiable

[Julia Boes]

Changeset: 214d6e21
Author:    Julia Boes <jboes at openjdk.org>
Date:      2021-04-08 13:09:26 +0000
URL:       https://git.openjdk.java.net/jdk/commit/214d6e21

8263506: Make sun.net.httpserver.UnmodifiableHeaders unmodifiable

Reviewed-by: michaelm, dfuchs

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