Dom spec compliance

[nielsdos]

TODO:

• spec links updaten in comments
• Check for remaining lacking coverge (https://app.codecov.io/github/nielsdos/php-src/blob/dom-spec-compliance/ext%2Fdom%2Fnode.c)
• meer attribute namespaces in parser?
• perf check new reconciliation
• reconcile on import/clone node
• reconcile adopt node (Checked: this is okay because no ns search is performed if parent is NULL)
• xml serializer
• namednodemap fixes
• setAttributeNode matching???
• zijn er nog entity decode/encode issues?
• Moeten attributes de external/internal subset respecten (old dom)?
• Check interactie met dingen gelijk xml schemas
• Perhaps the ns attributes should be added in front?
• SA checks, finish ups

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (master@6aa8687). Click here to learn what that means.

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Additional details and impacted files

@@            Coverage Diff            @@
##             master      #80   +/-   ##
=========================================
  Coverage          ?   71.08%           
=========================================
  Files             ?      813           
  Lines             ?   310408           
  Branches          ?        0           
=========================================
  Hits              ?   220655           
  Misses            ?    89753           
  Partials          ?        0           

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