net/dnsdist: Update to 1.2.1.

New Features
- Add configuration option to disable IP_BIND_ADDRESS_NO_PORT

Improvements
- Handle bracketed IPv6 addresses without ports

Bug Fixes
- Make dnsdist dynamic truncate do right thing on TCP/IP.
- Add missing QPSAction
- Don't create a Remote Logger in client mode.
- Use libsodium's CFLAGS, we might need them to find the includes.
- Keep the TCP connection open on cache hit, generated answers.
- Add the missing <sys/time.h> include to mplexer.hh for struct timeval.
- Sort the servers based on their 'order' after it has been set.
- Quiet unused variable warning on macOS (Chris Hofstaedtler).
- Fix the outstanding counter when an exception is raised.
- Do not connect the snmpAgent from a dnsdist client.

(fhajny)