nameservers with addresses are preferred, the rest
has same weight

no blacklisting, penalization or rtt scoring yet

instead of keeping just random NS and address,
it keeps a map of nameservers => {addresslist}

this allows scoring and correct NS election, fallback
and evaluation

example:
modules.hints = ‘{“input”:”/etc/hosts”}’
.. is equal to ..
modules.load(‘hints’)
hints.config(‘{“input”:”/etc/hosts”}’)

interface split to ‘map’ and ‘set’
added documentation
array: added array_tail() operation

the build system now doesn't always relink targets