more PHPDocs, unused var, small bit code reformatting

Update index.php

1 typo

Update lang.php

Microfix

Many PHPDocs, some unused and dyn declared vars

many PHPDocs
some unused variables
some dynamically declared variables declared

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more scrutinizer issue improvements

postgresql auth plugin: correct function name

parse AT parameter: first strtotime then timestamp
remove config option

scrutinizer documentations issues

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Additionally allow more media types

They are generated from the default ones and any additional one given
by the template. This allows to e.g. split admin styles from end user
styles in a closed wik

Additionally allow more media types

They are generated from the default ones and any additional one given
by the template. This allows to e.g. split admin styles from end user
styles in a closed wiki. You can then deliver only the user styles
using the metaheaders plugin.

show more ...

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