Major work done to support MFS mode. New gatherinv function that is only
called if in MFS mode. Gathered info is saved into /proj/emulab-ops/nodecheck

checkutils.sh
Start using traps for ERR and EXIT. New functions to make and use a list
of command to run at exit time. New function to save and set state of exit
on error flag.
instead of 100's

cpucheck
Adjust the rount1p function, round up to nearest 10's.

diskcheck
getmodel() and getserial() working in MFS mode for both Linux and FreeBSD
dd iflag=direct can not be used with if=/dev/zero

gatherinv
New file called only at MFS time to gather hwinventory

rc.nodecheck_sh and rc.nodecheck_perl
rewritten to handle calling gaterinv at MFS mode time, and finding
a functional bash adding it to the PATH