Mention the upper hard limit for -n option.  Patch slightly modified from PR version.
Mention the upper hard limit for -n option.  Patch slightly modified
from PR version.

PR:		168255
Submitted by:	Andy Kosela
Approved by:	gjb
MFC after:	3 days

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