All Babel intervals are encoded in centiseconds and must not be 0. In an
Update TLV the interval value 0xFFFF means infinity (RFC6126 Section
4.4.9). Update the test cases.
This change updates Babel decoder output format to match terminology of
draft-ovsienko-babel-hmac-authentication-00 and reverts recent addition
of DLen field to TLV type 12.
This change reflects a new Digest Length field added to Hash Digest TLV
in the current draft of Babel authentication spec. babel_print_v2() is
updated to fetch and validate the new field. Test files too.
This change extends existing Babel protocol decoder to recognise
experimental authentication TLVs (types 11 and 12) and includes
a respective test case for the new code.
