Fix oradd command resetsequence (again).
Make sure the directory transversal output URLs in sorted order.
Make sure the ssh URLs are sorted too.
Make URLs in listdir(), files() and dirs() sorted too.
Add support for encoding and errors to Oracle URLs.
Rename variables.
Output args for the oradd sql command only if we have args.
Add a method exists to all orasql objects to check whether the objects exists in the db.
Fix name of exists method and add one missing implementation.
Raise appropriate IO exceptions when Oracle objects can be found or are of the
wrong type.
Describe addition of exists method.
Document that URLs no longer forward attribute access.
Actually implement that URLs no longer forward attribute access.
We no longer handle 8 bit strings in ll.url, so we can remove the tests.
Implement walk(), walkfiles() and walkdirs() for Oracle URLs.
Add missing URL methods.
Fix typo.
Escape spaces as "+" again (as unescaping must be able to handle them anyway).
Document that Oracle URLs now support walk(), walkfiles() and walkdirs().
Spaces may be quoted aus "+" inside paths, so "+" is *not* path safe.