AbstractUploaderTestBase: do not try to handle non-local webroot

The whole point of these integration tests is that they run on
different machines or at least accounts. Therefore it just does not
make sense to try to clean up the web roots of the added update sites.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
WebDAV uploader: support spaces in file names

When uploading files with special characters in their file name, we need
to be extra careful. Spaces need to be passed as %20, and pretty much any
non-alphanumerical character has a special meaning.

Unfortunately, URLEncoder encodes for form values, and that means that
spaces are converted into plusses, and slashes are handled, too. So we
have to undo a little bit there.

Reported by Curtis Rueden as http://trac.imagej.net/ticket/1867.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Uploader Tests: make sure to test files with spaces in their names

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Merge branch 'webdav-space'

This fixes ticket 1867.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>