Discard Termcap and switch console apps to use Terminfo

* Switch bash, debugger, less, telnet[d] and top apps to use termcap
  functionality provided by ncurses lib instead of GNU libtermcap.so;
* NetBSD version of tput utility replaced with ncurses' one. Fixes #9606;
* terminfo database is provided as mandatory package installed during
  building target system;
* Remove libtermcap module. The termcap database source and
  corresponding build rules are not removed to provide backward compatibility -
  until all optional packages will be rebuild on upcoming system version
  using terminfo. Note that gcc2 builds may require to provide termcap a bit
  longer in the sake of binary compatibility with R5 era apps.