Support multiple glue records

Numeric algorithms from strings (quibble: there may be a typo in the original regex for ds-rdata attributes)
Merge branch 'upstream-rdap' of github.com:APNIC-net/whois into upstream-rdap

# By inazumax
# Via inazumax
* 'upstream-rdap' of github.com:APNIC-net/whois:
  gosh gee darn. cant get the properties for rdap to be exposed. over to you big D