[JENKINS-10989] Repeated ids, expandTextArea() and multiple "Invoke Ant" build steps

workaround.

- suppressed/fixed several compiler warnings

Use getFullName() instead of toString() when proposing nearest job name matches (based on pull request https://github.com/jenkinsci/jenkins/pull/290)

Fixed 'NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log' in jelly view of Maven jobs when running Jenkins with mvn hudson-dev:run

Add headers to e-mail notification

Mac installer: Much faster postinstall script

[FIXED JENKINS-7847] Require POST for doConfigSubmit on jobs

Merge remote branch 'ohtake/get-configsubmit'

[JENKINS-11383] "Changes" in Build Summary broken in IE standard mode since 1.434

Since the current version is 0.17, which isn't affected by
JENKINS-10641, this fix isn't urgent.