Clarify documentation of '-L' command line switch: the snapshot is unlinked as soon as the dump starts (and removed when the dump is completed, and the dump process exits). Previous wording was confusing because users might expect the snapshot to be visible in the .snap subdirectory while dump is running.
Clarify documentation of '-L' command line switch: the snapshot is
unlinked as soon as the dump starts (and removed when the dump is
completed, and the dump process exits). Previous wording was confusing
because users might expect the snapshot to be visible in the .snap
subdirectory while dump is running.

MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase