Convert scripts over to new setup methods where possible to avoid them
becoming increasingly outdated.  Some scripts are already broken, and
I don't use them so I'm not sure whether to remove them or fix them.

Scripts updated are llmount.sh, llrmount.sh, llecho.sh, lldlm.sh,
llmount-client.sh and llmount-server.sh.  They use the default config
scripts net*.cfg, obd*.cfg, ldlm.cfg, mds.cfg as needed to do the same
thing they used to do.