The mseed2tbuf program reads MiniSEED messages from one
ring, converts them to TRACEBUF2 messages, and deposits them into
another ring. The converted data will be split into two or more
TRACEBUF2 packets as needed to make sure that they don't exceed the
4096-byte TRACEBUF2 size limit. The mseed2tbuf binary is built via the ringdup code (with the "_MSEED2TBUF" symbol defined).