pfSense

Code spacing

and other random stuff I noticed.
I think this finishes messing with code style. The codebase should match
the developer style guide closely enough that 99.9% of changes will not
feel the need to also massage the formatting.

Ticket #4131 before formatting the mac extract the needed statistics from below

Remove pre-check and post-check from Cache-Control

If both `post-check` and `pre-check` are specified and set to `0`, both
are entirely ignored:

http://blogs.msdn.com/b/ieinternals/archive/2009/07/20/using-post_2d00_check-and-pre_2d00_check-cache-directives.aspx

Combine Cache-Control header in one line

Sorted by RFC 2616:

Section 14.9.1 `no-cache`
Section 14.9.2 `no-store`
Section 14.9.4 `must-revalidate`

Combined into one line with IE's `pre-check` and `post-check`. However,
when both set to `0`, both are entirely ignored:...

Merge pull request #1587 from Gertjanpfsense/master

Voucher messages using wrong config field name

https://forum.pfsense.org/index.php?topic=91168.msg505273#msg505273
$config['voucher'][$cpzone]['msgnoaccess']
and
$config['voucher'][$cpzone]['msgexpired']
do not exist.
These should be
$config['voucher'][$cpzone]['descrmsgnoaccess']...

Code Style sbin tmp usr

Bits and pieces from sbin tmp and usr but not yet usr/local/www

Fix lineup of copyright lines

and module names and other bits of formatting and typos in header
comment sections.

Welcome 2015

Change copyright statement to reflect reality