Undo the adjustment of the total memory used by dirhash in the case where allocating the dirhash structure fails. Fix a few typos in comments and update copyright.
Undo the adjustment of the total memory used by dirhash in the case
where allocating the dirhash structure fails. Fix a few typos in
comments and update copyright.

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