This was always the intention but the PointerSmudge functions would
automatically do it if the local files were missing. Now they take a
boolean argument to say whether to download or not, and the case of
skipped smudge is dealt with by writing out the original pointer data
and returning a known non-fatal error.
Previously using `.` `./` and `.\` would only behave as expected in subdirs
(because calculating the relative dir would resolve it), using them in the
root would match nothing. Behave as expected instead.
