0. Get list of domains, one per line into "domains" file

0.2 Build unbound with python module (not all Linux distributions have it enabled) using configure like:
./configure --with-pyunbound --with-pythonmodule --disable-gost --with-pthreads

0.5 Make "keys" file with trust anchors for libunbound validation, e.g.
.   IN DS   19036 8 2 49AAC11D7B6F6446702E54A1607371607A1A41855200FD2CE1CDDE32F24E8FB5

1. Scan domains' keys
python fetch_dnskey.py domains keys 20

2. Extract keys from logfile
./parse_keys.pl < fetch_dnskey.log > domain_dnskeys

3. List weak keys
./list_weak_keys.py < domain_dnskeys > weak_keys