Enhancement: Enable `blank_line_after_opening_tag` fixer (#875)

Enhancement: Enable `binary_operator_spaces` fixer

Closes GH-667.

Enhancement: Enable `array_syntax` fixer

Co-authored-by: MathiasReker <mathias@reker.dk>

Closes GH-659.

Enhancement: Enable `whitespace_after_comma_in_array` fixer

Closes GH-637.

Swap uses of _SERVER[DOCUMENT_ROOT] for __DIR__

2/4 - Update remaining except archives/ and release/.

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
use

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

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Prevent response header splitting

Fixed minor logic issues, as per E_NOTICE errors found within the logs.

Fix includes, and make redirects based on the already computed
language value

Do not interfere with general $lang parameter, use a whole $page param instead.

Add future manual format / language change form processor code