Fix #79451: DOMDocument->replaceChild on doctype causes double free

We have to reset intSubset if replacing doctype with another doctype node.

Closes GH-9201.
Closes GH-9376.

Revert Fixed bug #79451

The fix for 8.1 and above is not identical and I don't know how to fix without breaking the whole build apparently

Fix bug #79451: Using DOMDocument->replaceChild on doctype causes double free

Closes GH-9201

Promote warnings to error in DOM extension

Closes GH-5418

Remove proto comments from C files

Closes GH-5758

Fix [-Wundef] warning in DOM extension

Generate method entries for ext/dom

Closes GH-5374

Do not include the same stub multiple times

Closes GH-5322

[RFC] Implement new DOM Living Standard APIs in ext/dom

Rename php_dom_create_interator() to php_dom_create_iterator()

Thus fixing an obvious typo.

Fix #79271: DOMDocumentType::$childNodes is NULL

Dom level 2 core, DOM level 3 core and the DOM living standard agree
that `childNodes` always return a `NodeList`, and never `null`.

Use RETURN_THROWS() during ZPP in the date, dba and dom extensions

ext/dom: Replace usages of PHP_FUNCTION and aliases with PHP_METHOD.

Convert ext/dom to use arginfo stub.

Add missing ZPP checks

Closes GH-4878.

Small ext/dom cleanups

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Cleanup ext/dom: Additional unimplemented code following 25bfac4

Add do...while(0) for RETURN_* and ZVAL_* APIs

Closes GH-4255.

Cheaper checks for exceptions thrown from __toString()

Allow exceptions in __toString()

RFC: https://wiki.php.net/rfc/tostring_exceptions

And convert some object to string conversion related recoverable
fatal errors into Error excep

Allow exceptions in __toString()

RFC: https://wiki.php.net/rfc/tostring_exceptions

And convert some object to string conversion related recoverable
fatal errors into Error exceptions.

Improve exception safety of internal code performing string
conversions.

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Fix typos in code comments [skip ci]

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly used by Vim and Emacs editors
yet with recent changes the once working definitions don't work
anymore in Vim without custom plugins or additional configuration.
Neither are these settings synced across the PHP code base.

A simpler and better approach is EditorConfig and fixing code
using some code style fixing tools in the future instead.

This patch also removes the so called modelines for Vim. Modelines
allow Vim editor specifically to set some editor configuration such as
syntax highlighting, indentation style and tab width to be set in the
first line or the last 5 lines per file basis. Since the php test
files have syntax highlighting already set in most editors properly and
EditorConfig takes care of the indentation settings, this patch removes
these as well for the Vim 6.0 and newer versions.

With the removal of local variables for certain editors such as
Emacs and Vim, the footer is also probably not needed anymore when
creating extensions using ext_skel.php script.

Additionally, Vim modelines for setting php syntax and some editor
settings has been removed from some *.phpt files. All these are
mostly not relevant for phpt files neither work properly in the
middle of the file.

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Remove yearly range from copyright notice

Remove year range from copyright notice