* log.cc, log.h: new files

* log.cc, log.h: new files
* Makefile.in (OBJS): add log.o
* tar.cc: use exit_setup instead of exit
* dialog.cc (fatal): use exit_setup instead of ExitProcess
* msg.cc (fatal): ditto
* install.cc (dialog_cmd): ditto
* ini.cc (do_ini): ditto
* main.cc (main): add logging
* source.cc (do_source): ditto
* root.cc (do_source): ditto
* site.cc (do_site): ditto
* other.cc (do_other): ditto
* net.cc (do_net): ditto
* choose.cc (do_choose): ditto
* download.cc (do_download): ditto
* install.cc (do_install): ditto
* msg.cc (fatal): ditto

* res.rc: mark password boxes as *being* password boxes.