Add a new macro to deal with conflict between ncurses from base and ncurses from ports.
If a ports is linked against ncurses from base or from the ports, it should then add:
USE_NCURSES=yes

it is also possible to specify the hard dependency on the ports ncurses or one the base one adding the following macros:
WITH_NCURSES_PORT=yes or WITH_NCURSES_BASE=yes

PR: ports/155269
Submitted by: me
Reviwed by: pav@
Approved by: portmgr (pav@)
Exp-run by: portmgr (pav@)