Log Message:
Update to 2.70.3

Changelog:
What's new in 2.73 (2017-08-06)

    Avoid unnecessary locking to improve performance related to actions. (issue \ 
45244)
    Improve performance when reading the console text of a build. (issue 45915)
    Add Polish translations for setup wizard. (pull 2952)
    Reliably close build log file when using chained BuildListeners. (issue \ 
45057, issue 43199)
    Modify the JNLPLauncher configuration page to work around regression in \ 
Docker Plugin (regression in 2.72). (issue 45895)

What's new in 2.72 (2017-07-30)
70 sunny0 cloudy11 stormCommunity reported issues: 7×JENKINS-45895 \ 
1×JENKINS-45956

    Enable remoting work directories by default for newly created agents \ 
launched via JNLP (Java Web Start Launcher). (issue 44112, feature \ 
documentation)
    Always follow redirects for downloading update center metadata, so \ 
misbehaving plugins cannot break it. (issue 38185)
    Minor optimization to queue maintenance routines and printing of console \ 
notes, mainly for the benefit of Pipeline node blocks. (issue 45553)
    Don't monitor response time on offline agents. (issue 20272)

What's new in 2.71 (2017-07-23)
Community reported issues: 2×JENKINS-45959 1×JENKINS-45895

    Winstone 4.1: Add Jetty HTTP/2 connector and corresponding options for \ 
Winstone-Jetty. (issue 45438, enabling HTTP/2 support in Winstone-Jetty)
    Don't reload user records from disk unless explicitly requested to improve \ 
performance of user record access. (issue 45737)
    Prevent NullPointerException in Jenkins#getRootURL() while the instance is \ 
not fully loaded yet. (issue 34914)
    Contributions to the PATH environment variable could result in malformed \ 
values on agents on a platform different from master's. (issue 14807)
    JNLP for launching agents now requests Java 8. (issue 45679)
    Prevent NullPointerException when a previous completed build is missing for \ 
upstream culprits check. (issue 45516)
    Correctly show or suppress warnings about undefined parameters based on \ 
hudson.model.ParametersAction.keepUndefinedParameters system property. (issue \ 
45519)
    Internal: Delete obsolete SECURITY-144-compat exclusion that can break \ 
tests. (issue 25625)