Remove references to userstat(1) and jailstat(1).  Those tools were never merged from the Perforce branch.  They might be brought in when %CPU limits go into the tree.
Remove references to userstat(1) and jailstat(1).  Those tools were never
merged from the Perforce branch.  They might be brought in when %CPU limits
go into the tree.

PR:		docs/171240
MFC after:	2 weeks

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