Merge branch 'JENKINS-19486_Polling_with_workspace_gets_incorrect_environment' of https://github.com/Vlatombe/jenkins into Vlatombe-JENKINS-19486_Polling_with_workspace_gets_incorrect_environment

[FIXED JENKINS-10675] use X-Forwarded-Proto if present

(Implies reverting c4e3adde as well, since we need resolvePluginFile to return null.)

Better wait until build is finshed and remove existing CauseAction.

[FIXED JENKINS-19251] Use hashes rather than modification time to determine if Maven agent JARs are up to date.

position

move environment in maven project to same location as in freestyle project

[fixed JENKINS-19740] Added postCheckout for SCMs

- 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.

This reverts commit 647695e2.

This reverts commit 647695e2.

[FIXED JENKINS-19613] 49c731fc 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.