Update kses.php

[Rajinsharwar]

Adding ESI in the allowed HTML list

Trac ticket: https://core.trac.wordpress.org/ticket/58921

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[alewolf]

This patch doesn't work and won't solve the issue. It doesn't allow the full tag name which is esi:include.

And adding esi:include to that allow list won't work either. It get's ignored because of the colon somehow.

[martinkrcho]

@Rajinsharwar have a look at the approach implemented in #4929, please.

Would you also please close this pull request? Thank you

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Props rajinsharwar, martinkrcho.

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