www/anyterm: mark BROKEN

When building from ports, it segfaults on startup.
Package is broken with:

ld-elf.so.1: /usr/local/lib/gcc10/libstdc++.so.6: version GLIBCXX_3.4.29 required by /usr/local/sbin/anytermd not found

Maintainer missing for months.

PR: 257058
Reported by: Alex <r7st.guru@gmail.com>