identifyClient

Map a 20-byte peer-id to a human-readable client name and version: the port of libtorrent's identify_client (aux::identify_client_impl).

Resolution order is identical to libtorrent:

1. all-zero peer-id → "Unknown".

2. the non-standard GenericMappings table (offset + literal-prefix matches).

3. the bespoke special cases: Bits on Wheels, eXeem, the two Experimental builds.

4. Azureus style, then Shadow style, then Mainline style, each rendered via the two-letter-code lookup table.

5. first-12-bytes-zero → "Generic".

6. otherwise "Unknown [....]" with non-printable bytes shown as '.'.

Parameters