Move the ipfw(4) xref to the description of LOG_SECURITY instead of LOG_UUCP.
Move the ipfw(4) xref to the description of LOG_SECURITY instead of
LOG_UUCP.

PR:		docs/23302
Submitted by:	cshumway

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