Merge branch 'stable-4.9'

* stable-4.9:
  Fix IllegalThreadStateException if stderr closed without exiting

Change-Id: I8a6a6788c2bb000171233b88d9592ed0640ad15e

diff --cc org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties
Simple merge

diff --cc org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java
Simple merge

diff --cc org.eclipse.jgit/src/org/eclipse/jgit/util/FS.java
Simple merge