+ Remove the check for whether you can remove -liconv from the linker
  command line or not -- we want to do what the user specifies via
  the pkgsrc PREFER_* settings.

+ Drop dependency on ncurses -- vim only wants a termcap library.
  This should fix PR pkg/38110.

+ Add missing dependency on gettext-lib as one of the "normal" feature
  sets is to build with gettext and multi-language support.

Bump the PKGREVISION of vim editor packages to 1.

(jlam)