Hostname addon to fix openjdk7 buffer overflow (#2651, GH-145).

--HG--
extra : amend_source : 3a9b9f7798e5c464ebbee9e311588d37bc62fe25

.travis.yml

@@ -28,13 +28,10 @@ matrix:
      - os: linux
        env: CUSTOM_JDK="default"
 
+addons:
+  hostname: jyshort
+
 before_install:
-  # Patch for buffer overflow bug, see https://github.com/travis-ci/travis-ci/issues/5227
-  - hostname
-  - cat /etc/hosts # optionally check the content *before*
-  - sudo hostname "$(hostname | cut -c1-63)"
-  - sed -e "s/^\\(127\\.0\\.0\\.1.*\\)/\\1 $(hostname | cut -c1-63)/" /etc/hosts | sudo tee /etc/hosts
-  - hostname
   - cat /etc/hosts # optionally check the content *after*
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then export JAVA_HOME=$(/usr/libexec/java_home); fi
   - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update; fi

NEWS

@@ -5,6 +5,7 @@ https://github.com/jythontools/jython
 
 Development tip
   Bugs fixed
+    - [ 2651 ] Travis builds failing with *** buffer overflow detected ***
     - [ 2703 ] JycompileAntTask cannot find ...ant.taskdefs.MatchingTask
     - [ 2708 ] test_urllib2net fails (on Travis CI)
     - [ 2764 ] Readme is not displayed when using the GUI installer