I am modifying monowall for use as a WAN emulator and I need to add the 
kernel HZ=1000 option to improve the delay granularity. I am applying the 
kernel patches (410) and I am getting errors with three of them:

ipnatmss.patch is trying to patch a file mlf_ipl.c that does not exist. 
Then it patches a file named mlfk_ipl.c that does exist and that patch 
works. Is this an either/or type patch?

ip_fil3.4.33-icmpcks-fix.diff and ip_state.c.patch fails. They also seem to 
be modifying the ipfilter code.

I am building this off of the 4.10 ISO image and I did not do a cvsup prior 
to trying the patches (box has no Internet access)

Is there an easier way to add the HZ=1000 option?

I am learning a lot about FreeBSD but time is short...
Len