copy files/*.html verbatim (skip filters)

Use case: Google site verification.

And besides, verbatim copying is generally what a person putting .html
files in there would want (why not make them stories if that’s not the case?)

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
don't forget query parts of links

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
document #1369

[ci skip]

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
fix #1364 -- make slugless wordpress blogs work

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
fix #1354 -- copy .html source files as .src.html

This is the first fix described in #1354.  `.html` source files are now copied as
`.src.html`, verbatim.  This can be useful in some cases, eg. for debug purposes.

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>