Fix typo in comment.
Extend the kernel's ps_strings mechanism to allow user processes to export
chunks of memory describing sandbox classes, methods, and objects for use
by other processes -- in particular, procstat(1).  The kernel doesn't
interpret the memory, it just provides it, on request (and with suitable
authorization) via sysctl.

Full 32-bit compat support is not implemented as CHERI only supports 64-bit
operation; however, if we were to reuse this mechanism for Capsicum (quite
plausible) then we would want to add it.