This reverts commit ee8cec3a.

(cherry picked from commit fb5540e3)

[FIXED JENKINS-4409] Disable URLConnection.useCache in tests on Windows. It prevents deleting temporary directories when tests finish.

(cherry picked from commit c4e5fbdb)

(cherry picked from commit a87a5a1a)

(cherry picked from commit 58a41bcb)

(cherry picked from commit fae41b01)

make equal height of tab regardless if selected or not

(cherry picked from commit 70613202)

(cherry picked from commit b31bb1cc)

(cherry picked from commit 327f7780)

Make WorkspaceList.Lease implement AutoCloseable for Java 7 callers, to make releasing the lease more convenient.
(cherry picked from commit a398cabd)

[JENKINS-26698] Make sure BuildExecution.cleanUp always calls super, to release the workspace lease.
Also stop closing the build log in Run.handleFatalBuildProblem; we want to see any subsequent messages too.
(cherry picked from commit 62af87b6)

[SECURITY-177] Reflected XSS in AdjunctManager.doDynamic

Added a test case to cover bases

Conflicts:
	core/src/test/java/hudson/util/FormValidationTest.java
	test/src/test/java/hudson/model/UserTest.java

[SECURITY-171] XSS in FormValidation._error(..., Throwable, ...)

[SECURITY-180] arbitrary API Token change/leak via changeToken

Add nosniff header liberally to every request we serve.

(cherry picked from commit 778e9e19)

(cherry picked from commit 1dd60ec7)

Conflicts:
	changelog.html

(cherry picked from commit 1a80973a)

(cherry picked from commit 44e6b5d7)

(cherry picked from commit 1186e7b4)

(cherry picked from commit b090751c)

(cherry picked from commit 9a8329eb)

This should work across builds and even across jobs, and does not force us to load other builds.
(cherry picked from commit 2f59ffc4)

Conflicts:
	changelog.html

(cherry picked from commit 3ed7778b)