Fix the missing carriage-returns in the shell (bash) prompts by always...

Fix the missing carriage-returns in the shell (bash) prompts by always building with the stderr logging
support (in *nix builds) - but run-time disable as desired via EX_NOLOG option. I've been wanting to get
rid of that "XTERN_*" macro for a long time anyway (it's "XTRN" damn-it!). :-)