Add MaxPayloadSize for Frame Stream Inputs.
Add MaxPayloadSize for Frame Stream Inputs.

The golang-framestreams default maximum size is 1MiB, which is
excessively large for encapsulating a DNS message of at most
64KiB in size. Set a more reasonable default maximum payload
size for the Dnstap application.

dnstap/golang-dnstap,dnstap/golang-dnstap