Removed useless/deprecated code

Pad arrays to avoid undefined array offsets #245

Fix flags not being stored in metadata #245

More efficient exclude

Use @preg_match instead of preg_match

Make preg_match call before array_push.

Add check if flag is set

Add 'exclude' option

Hide section edit buttons if flag noeditbtn is set

SPR-512, closes #145 on GitHub

Also query section IDs for format 'odt', not only for 'xhtml'. Fixes #182.

fixes signature strict notices

Fix PHP strict warnings

Adjust internal links to be local if the target page is included

This changes internal links in included pages whose target page is
included into links to the target page. This only works for xhtml

Adjust internal links to be local if the target page is included

This changes internal links in included pages whose target page is
included into links to the target page. This only works for xhtml output
with additional support for the dw2pdf plugin, other output formats are
not affected by this change.

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Add (r)sort and order flags for namespace includes #96 #61

This adds the following ordering criterias:
- page ID (current behavior, default)
- title
- date created
- date modified
- indexmenu sort t

Add (r)sort and order flags for namespace includes #96 #61

This adds the following ordering criterias:
- page ID (current behavior, default)
- title
- date created
- date modified
- indexmenu sort tag metadata
- include plugin sort tag metadata (new syntax: {{include_n>[number]}})

When the rsort flag is set, the ordering will be reversed. Both flags
are available as configuration option, too.

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Add 'depth' flag and option for the maximum depth of namespace includes

The default is 1, i.e. the former behavior, 0 allows unlimited depth.

Add PHPDoc comments and variable definitions to the include syntax part

Conflicts:
syntax/include.php

Write relation haspart metadata

On https://www.dokuwiki.org/devel:metadata it has been documented that
the include plugin writes the relation haspart metadata, with this
change it actually writes it.

Use sectionID() only when a section is given. Closes #67 and closes #66

The problem was that sectionID() when NULL is given as parameter returns
'section' which leads to strange links in headings an

Use sectionID() only when a section is given. Closes #67 and closes #66

The problem was that sectionID() when NULL is given as parameter returns
'section' which leads to strange links in headings and empty headings
also get 'section' as id so they are selected when the whole page is
included. Please upgrade and purge the cache (at least for the pages
where the bug occurs).

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Use sectionID instead of cleanID for sections. Closes #62

Now the internal section ids that are compared should match the ones
that are displayed in the url so the ids from the url can be used
inste

Use sectionID instead of cleanID for sections. Closes #62

Now the internal section ids that are compared should match the ones
that are displayed in the url so the ids from the url can be used
instead of the original title in all cases and even when the title is
not unique you can select the section by appending a number in the same
way it is done in urls (but note that included headers are not seen in
the include plugin so for nested includes the appended numbers might
differ).

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Fix detection of inline_content parameter

An empty inline_content parameter set the inline_content value of the
metadata to false although the content has been displayed. This should
fix caching for

Fix detection of inline_content parameter

An empty inline_content parameter set the inline_content value of the
metadata to false although the content has been displayed. This should
fix caching for the inline_content flag.

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Add linkonly option for displaying a link instead of the content

This commit adds a linkonly option that makes the include plugin behave
like internal links except that each link is wrapped inside a

Add linkonly option for displaying a link instead of the content

This commit adds a linkonly option that makes the include plugin behave
like internal links except that each link is wrapped inside a paragraph.
When the url parameter "include_content" is set, all includes are
displayed as full includes. This makes it possible to have a page with a
list of a lot of pages as table of contents and then to export all these
pages as single large document with setting that url parameter. This is
useful for creating things like books or larger documentations.
This feature has been requested and sponsored by Jörg Ferlein.

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Add relation references metadata for backlinks

With this addition included pages are also listed under backlinks (with
the problems backlinks currently have).

Detect and remove persistent metadata created by previous versions

Previous versions of the include plugin created persistent metadata, now
that metadata is detected and removed when the page is ren

Detect and remove persistent metadata created by previous versions

Previous versions of the include plugin created persistent metadata, now
that metadata is detected and removed when the page is rendered.

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Use compact instead of a full array declaration

Move the section edit recognition into the helper/wrap syntax