A common protocol structure is to have a header containing a length field, followed by data of length bytes, followed by additional protocol fields such as a CRC. If the length field is variable, the position of subsequent URH-specified protocol fields defined by fixed position will not be in the correct location.

I do not know the best way to address this, but quick and easy way to support

largest occurrence of cout is in hier_block2_detail, for no good reason!

would be relatively easy to replace with GR_LOG_INFO(d_logger,…), but it's mechanic. When done, remove all remainders of debug #ifs and #include <iostream> from the files

Partially addresses #4763

Files to be fixed:

• hier_block2_detail
• qa_blocks_tags.cc
• polar_decoder_common.cc (at least