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remove obsolete opera handling and session closing

remove no longer used ajax.php

Info plugin: allow xhtml renders to not to be an xhtml renderer

Renderers that set the format to xhtml don't necessarily inherit from
Doku_Renderer_xhtml, this reverts a prior change that introduced

Info plugin: allow xhtml renders to not to be an xhtml renderer

Renderers that set the format to xhtml don't necessarily inherit from
Doku_Renderer_xhtml, this reverts a prior change that introduced the
stricter parameter type.

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comment improvements

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fix signature mail unittest, and improve some signatures info plugin

fix signatures and old by references

fix php strict notices

Fix PHP strict messages

Put syntax modes in a table layout, sort numbers in rowspans. Implements FS#2516

add PHPDocs to popularity plugin helper

get version popularity plugin direct from plugin info

acl ajax: add messages to returns

acl ajax: replace die() by return

Code reformatting and remove unused global conf

remove unused variable

move ajax.php to action.php. Fixes FS#2233

translation update

typo fix PR #368

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