13-alpha2 libncurses removal breaks ports build

[Kostya Berger]

Hi everyone,I don't seem to find any mentioning in the /usr/ports/UPDATING about how one should handle the removal of libncurses.so.9 from base. 
Source UPDATING only says:ncurses installation has been modified to only keep the widechar
        enabled version.  Incremental build is broken for that change, so it
        requires a clean build.
If that means to just build all ports anew, then it doesn't work as ports don't seem to incorporate any change related to this one. It would seem default configuration should take into account this, but it doesn't.

The ports just use --with-libncurses-prefix=/usr, and there is no ncurses libs found there. This make it skip MOST of the ports I'm using.

Working Copy Root Path: /usr/ports
URL: https://svn.freebsd.org/ports/head
Relative URL: ^/head
Repository Root: https://svn.freebsd.org/ports
Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5
Revision: 562417
Node Kind: directory
Schedule: normal
Last Changed Author: 0mp
Last Changed Rev: 562417
Last Changed Date: 2021-01-23 23:01:38 +0300 (Sat, 23 Jan 2021)

With kindest regards,
Kostya Berger