largefiles: test interaction between largefiles and vanilla clients and servers This reintroduces tests for the case described by issue3066, among others: - vanilla clients and servers should still be able to talk to largefiles clients and servers about vanilla repos - vanilla clients should not attempt to clone largefiles repos over http and should report a useful error message (issue3066; this appears to work correctly) - vanilla clients should not attempt to clone largefiles repos over ssh, again with a useful error message - largefiles clients should not attempt to push largefile changes to vanilla servers

tests: darcs > 2.5 got "smart" about encoding, disable encoding tests We can no longer convert a repo with mixed encodings, nor can I even figure out how to get Darcs to display such messages.

check-code: catch BaseException and os.path.relpath

largefiles: py2.4 doesn't have BaseException ..and it's the wrong base class anyway.

largefiles: rename lfconvert --tonormal option to --to-normal

largefiles: test lfconvert --tonormal

largefiles: use smaller files in test script

largefiles: test that minimum size can be a float This allows us to drop the existing test of --lfsize, since it's redundant with the new test.

largefiles: polish comments in test script

import: abort usefully if no patch name given