typefindfunctions: Make XML typefinder more strict
If a XMLDec is found, check also for its end. Similarly, check for the end of the XML tag we're looking for and make sure that the following characters are valid.
Fixes #1536 (closed)
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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
If a XMLDec is found, check also for its end. Similarly, check for the end of the XML tag we're looking for and make sure that the following characters are valid.
Fixes #1536 (closed)