visibility definition for the renderers

I made a lot of things public that probaly should be protected. But many
syntax plugins do access renderer mechanisms directly, so better stay on
the safe sid

visibility definition for the renderers

I made a lot of things public that probaly should be protected. But many
syntax plugins do access renderer mechanisms directly, so better stay on
the safe side here.

The base renderer is now abstract.

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remove DOKU_INC checks

There is no need for this check, since these files should not have any
main code that is executed on direct call.

Fixes PSR1.Files.SideEffects.FoundWithSymbols

fix: initialize vars to prevent PHP Notice

A PHP Notice occurred when $url didn't contain a '?'.

Fix sanitation of $language for code highlighting (fixes #2080)

Fix PHP Notices: Reduce error log noise

While DokuWiki suppresses PHP Notices they are still a code smell and
should be fixed. This fixes some PHP Notices that occurred.

Some of these fixes could b

Fix PHP Notices: Reduce error log noise

While DokuWiki suppresses PHP Notices they are still a code smell and
should be fixed. This fixes some PHP Notices that occurred.

Some of these fixes could be refactored into nicer code once we move to
PHP 7 and get access to the `??` operator.

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added table footer support to renderer

This allows plugins to easily render a <tfoot> element in a table, even
though it's not used in standard table syntax it makes sense to have it
available.

Encode unsafe characters in interwiki links. closes #1220

Unit test for interwiki URL encoding bug

add missing tabletbody_open|close() to renderer

Merge remote-tracking branch 'origin/master' into scrutinizerissues

Conflicts:
inc/media.php
inc/plugin.php
inc/template.php
lib/plugins/authplain/_test/escaping.test.php
lib/plugins/syntax.php

Update inbuilt renderers for node/leaf state in listitem_open
- includes, xhtml renderer adding 'node' class to <li> when it contains
child list(s)

Many PHPDocs, some unused and dyn declared vars

many PHPDocs
some unused variables
some dynamically declared variables declared

added short comment on how a renderer works

added doc blocks for xhtml renderer

added doc blocks to all functions in renderer

reformatting

Merge pull request #387 from splitbrain/tablethead

Adding <thead> to tables

Merge branch 'master' into tablethead

Merge remote-tracking branch 'origin/master' into userlink

Conflicts:
inc/parser/renderer.php
inc/template.php

suppress errors where list() may not fill all vars

remove require handled by autoloader

add renderers to autolader

fix comment in _resolveInterWiki

interwiki : prefixed configurls handled as wikilinks

code reformatting