tty role selection when filter by options

tty role selection when filter by options

Honor things like OPTIONS:role=!tourist and NETHACKOPTIONS='race=!orc'
when performing interactive role selection.  I don't think it was
completely correct when players let the program choose, but it must
have been close enough because we haven't gotten any complaints.
The post-3.4.3 interactive selection was ignoring options-base filtering
entirely and did get complaints for the pre-beta.

Role selection has a ton of code which bloats the program without doing
anything useful for actual game play.  It ought to be split off into a
separate front end.