New structure with config.py; explicit logging.

improve logging, fix for erlexec's required env HOME, use pfexec to run tests as noaccess:noaccess if env var USE_RCTL is set; if env var USE_RCTL is set, let Solaris guard resources (cpu time, mem) instead of the timer with a fixed period in user space

execute /usr/bin/newtask aka invoked copiler/interpreter with uid=noaccess and gid=noaccess

- add env var USE_RCTL to get tests running on Solaris machines, which have not defined the appropriate projects (i.e. uses newtask if set only) - startup/env_iws.tcsh - no need to adjust backends/**/*.sh anymore

use ksh instead of fast sh with reduced features

fix logging system add resource ctrl to scripts

Changes from before the disk crash.