[VFS-486] DefaultFileMonitor sleeps for twice the specified delay when checkPerRun > 0.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/vfs@1513471 13f79535-47bb-0310-9956-ffa450edef68
[VFS-489][tests] ProviderWriteTests#testListener does not fail cleanly. Thanks to Bernd Eckenfels.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/vfs@1513473 13f79535-47bb-0310-9956-ffa450edef68
Better Javadoc.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/vfs@1513482 13f79535-47bb-0310-9956-ffa450edef68
[VFS-265][FTP] Set user dir as root dir by default.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/vfs@1513484 13f79535-47bb-0310-9956-ffa450edef68