Comment 5 for bug 191199

note that xml.cgi sends the wrong mimetype, too.
The current version on b.m.o sends text/plain, and lxr said it would send
text/html. tststs, text/xml it should be.

Talking about entities, the xml produces by xml.cgi should be readable for
Mozilla, IMHO, so it needs to be standalone. No dtds are loaded over the
network at all.
If you want to use entities, declare them in the document, or stick to the basic
XML entities plus numerical.