A few shared libraries in the base system link against ncurses. An
upgrade from a 12.x host to 13 results in ABI breakage for existing
binaries since the newer versions of these libraries link against the
newer ncurses while the binary itself links against the older ncurses.
For example, dialog4ports built on 12.x sometimes crashes on 13 since
it depends on libdialog which links against ncurses internally.
MFC after: 3 days
Reviewed by: kib, delphij
Differential Revision: https://reviews.freebsd.org/D28448
0b7f1af804