Remove src/contrib/bind/bin/nslookup/commands.c as it is generated by lex
from commands.l.
Submitted by: lpc/cdcontrol patches originally by msmith.
Reviewed by: msmith (in theory)
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.