Quite a few build warnings building recursor on Fedora rawhide

[rubenk]

• Program: Recursor
• Issue type: Bug report

Short description

Building the recursor on Fedora 28 generates quite a few build warnings like the following:

  CXX      dnssecinfra.o
dnsrecords.cc: In member function 'ComboAddress AAAARecordContent::getCA(int) const':
dnsrecords.cc:119:30: warning: 'void* memset(void*, int, size_t)' clearing an object of non-trivial type 'union ComboAddress'; use assignment or value-initialization instead [-Wclass-memaccess]
   memset(&ret, 0, sizeof(ret));
                              ^
In file included from dnsrecords.cc:27:
iputils.hh:85:7: note: 'union ComboAddress' declared here
 union ComboAddress {
       ^~~~~~~~~~~~

It's not a big issue, but the amount of warnings makes it hard to see the important ones.

Environment

• Operating system: Fedora rawhide
• Software version: recursor 4.1.3, g++ 8.1
• Software source: tarball from powerdns.com

[pieterlexis]

#6590 might need backporting

[omoerbeek]

Merged and backported to 4.1