dsynth - pkg install -U and improve debug support

dsynth - pkg install -U and improve debug support

* pkg install now passes the -U option to avoid trying to access remote
  repos.

* Multiple -d's will turn off ncurses and log to stdout, but what we
  really want to do is to log to a file.  Fix thet 'single -d option'
  feature to now log to 07_debug.log.

* Package dependencies on generic flavored ports (i.e. a depdency which
  does not specify the flavor) were sometimes improperly flagged for
  building even when the default flavor had failed.

Reported-by: zrj