[xml] xmlParseFile, htmlParseFile and URI

[Kang Jeong-Hee <Keizi mail co kr>]

htmlParseFile() seems to allow remote URI as well as local filename,
with internal call of xmlParserInputBufferCreateFilename().

xmlParseFile(), OTOH, seems not to allow remote URI.
Codes inside xmlCreateFileParserCtxt() does not give a clue for that matter.

And if remote URI supported, why don't you replace the name of argument
'filename' with 'URI' for identifying that remote URI is supported?
It won't break any backward compatibility. It's tirivial but helpful.

regard,
kz.