[fixed JENKINS-19740] Added postCheckout for SCMs
[FIXED JENKINS-19613] 49c731f made PROXY_HEADER static under the assumption that XStream would treat that like a missing field.
Unfortunately it threw an error instead, breaking startup; fixed by renaming the constant.
Merge branch 'master' of github.com:jenkinsci/jenkins
[JENKINS-19752] Noting.
Merge branch 'master' of https://github.com/jenkinsci/jenkins
Revert "[JENKINS-16502] Permission to see an executor/slave"

This reverts commit 647695e2ffc2f568ca1b80bc5b0cd7b0658eeb3d.
[FIXED JENKINS-15757] Disable\Delete "Remember me on this computer" check box in login screen

- Adds an option to the Global Security screen to hide the remember me checkbox
- A crafty user could use their browser to re-insert the form field and thereby get Jenkins to set the
  remember_me cookie on their browser, but this option should cover the 99.9% case.
Merge pull request #952 from wolfgarnet/master

[fixed JENKINS-19740] Added postCheckout for SCMs
Add changelog record for PR #952