[cvs-nhc98] No longer hard-code the location of the system-wide config

malcolm: Fri Jan 18 12:59:38 CET 2002 Update of /usr/src/master/nhc/src/hmake In directory hinken:/tmp/cvs-serv21428 Modified Files: Config.hs Makefile MkConfig.hs Log Message: No longer hard-code the location of the system-wide config file into a generated file (Local.hs). Instead, read the environment variable HMAKEDIR, which gives a better guarantee that we get the config which really belongs to the executable.