Miscellaneous content fixes:
Miscellaneous content fixes:

* xref sysctl
* do not mark kern.ipc.mbuf_wait up as a function argument.
* do not mix case of function argument names
* a mbuf -> an mbuf
* if -> whether
* typos

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