File.exists? is a deprecated name, use File.exist?

File.exists? is a deprecated name, use File.exist?
Merge pull request #15794 from vishalzambre/patch-1

File.exists? is a deprecated name, use File.exist?
Revert "Merge pull request #15794 from vishalzambre/patch-1"

This reverts commit 6d800a909e24465ca6f3fa5206222fa7d78967f6, reversing
changes made to 6a051299f98ee43864326c6c0a4f7d169d22b3f8.

We don't apply non-security fixes to 3-2-stable branch!!!
Make sure Active Support configurations are applied correctly

Before this patch configuration set using config.active_support
would not be set.

Closes #15364
Use a version of execjs compatible with Ruby 1.8
Check against bit string values using multiline regexp

Fix CVE-2014-3482.
Preparing for 3.2.19 release
Merge branch '3-2-sec' into 3-2-stable
Regenerate sid when sbdy tries to fixate the session

Fixed broken test.

Thanks Stephen Richards for reporting.
FileHandler should not be called for files outside the root

FileHandler#matches? should return false for files that are outside the
"root" path.

Conflicts:
	actionpack/lib/action_dispatch/middleware/static.rb

Conflicts:
	actionpack/lib/action_dispatch/middleware/static.rb
	actionpack/test/dispatch/static_test.rb
bumping version to 3.2.20
Merge branch '3.2.20' into 3-2-stable

* 3.2.20:
  bumping version to 3.2.20
  FileHandler should not be called for files outside the root