Update distribution info for docs

New server hosting the docs, new path on disk.
Unused import.
Adds a BreakableFileSystemAbstraction and uses it for TestDirectMappedLogBuffer.

Adds BreakableFileSystemAbstraction which is a FileSystemAbstraction that can
 break in highly customized and interesting ways.
Adds a test in TestDirectMappedLogBuffer which shows how things can break
 when DMLB is reused after an exception in writeOut(). This test rightfully
 breaks and is Ignored.
Attempting to fix upload of docs.
Removes shutdown hook during normal stop, preventing leaks
Merge pull request #1269 from digitalstain/remove-server-hook

Remove server hook
Merge remote-tracking branch 'upstream/1.9-maint'