MDK9.1 ipsec module fix

The ipsec kernel module shipped with mdk9.1 has a bug that prevents it from loading into the running kernel. Fixing it is easy.

As root, run 'modprobe ipsec', if it prints an error message, follow the instructions below. If it doesn't print an error, ignore this page.

1. Follow the instructions on the kernel prep page
   Note: You are just building one kernel module, not a whole new kernel

2. # wget http://speculation.org/garrick/ipsecpatch.sh
   # sh ipsecpatch.sh
   # cd /usr/src/linux
   # make modules  (this will take a while, do something else while waiting)
   # gzip < net/ipsec/ipsec.o > /lib/modules/`uname -r`/kernel/net/ipsec/ipsec.o.gz
   # modprobe ipsec  <-- look!  no error!