[7u4] Request for approval for CR 7128648: HttpURLConnection.getHeaderFields should return an unmodifiable Map

[Chris Hegarty]

Hi,

This is a request to backport a JDK 8 fix into JDK 7u4:

7128648: HttpURLConnection.getHeaderFields should return an unmodifiable Map

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7128648

The fix has already been pushed to JDK 8:
http://hg.openjdk.java.net/jdk8/tl/jdk/rev/31a1fc60a895

The code changes for jdk7u4 are identical to the ones in jdk8.

Thanks,
-Chris.