[LGM] Program epub

[Manuel Schmalstieg]

>
> no idea why wordpress is so restrictive...
>

out of curiosity, i searched the WP Trac, and found that it's for
security reasons:
https://core.trac.wordpress.org/ticket/27063

"Unfortunately XML files need to be carefully sanitized in order to
not be vulnerable to some serious vulnerabilities, namely an XML bomb
(exponential entity expansion) and XXE (XML external entity)
injection. We have no plans to attempt this in core, as these are just
incredibly dangerous."

cheers,
Manu