Better lvar names.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/vfs@1525647 13f79535-47bb-0310-9956-ffa450edef68
[VFS-494][SFTP] No support for SFTP servers with non Latin-1 file name encoding. The provided patch did not apply cleanly, this version should be equivalent.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/vfs@1525663 13f79535-47bb-0310-9956-ffa450edef68