DISPATCH-413 Reference the AMQP Management spec in docs in a less ambiguous manner

[jiridanek]

The spec in question is AMQP Management v1.0 WD09. I managed to find a newer working draft WD12 of the spec, but I did not manage to download a readable copy of it. It looks like the spec never got past working drafts anyways.

CC @pwright

[codecov-commenter]

Codecov Report

Merging #1358 (ebd4ae8) into main (cdb51f9) will decrease coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1358      +/-   ##
==========================================
- Coverage   84.76%   84.62%   -0.15%     
==========================================
  Files         114      114              
  Lines       28403    28404       +1     
==========================================
- Hits        24077    24038      -39     
- Misses       4326     4366      +40     

Impacted Files	Coverage Δ
src/iterator.c	89.29% <0.00%> (-4.05%)	⬇️
src/router_core/connections.c	89.47% <0.00%> (-1.28%)	⬇️
src/router_core/delivery.c	93.34% <0.00%> (-0.74%)	⬇️
src/router_core/route_tables.c	82.70% <0.00%> (-0.58%)	⬇️
src/router_core/router_core.c	86.52% <0.00%> (-0.48%)	⬇️
src/message.c	87.35% <0.00%> (-0.14%)	⬇️
src/router_node.c	93.55% <0.00%> (+0.09%)	⬆️
src/adaptors/http1/http1_server.c	85.71% <0.00%> (+0.28%)	⬆️
src/router_core/transfer.c	94.39% <0.00%> (+0.64%)	⬆️

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[pwright]

@jiridanek looks good, note that we normally[1] refer to 1.0 spec at http://www.amqp.org/resources/download

[1] https://qpid.apache.org/releases/qpid-dispatch-1.12.0/user-guide/index.html#overview-of-amqp-qdr

[jiridanek]

This is not part of AMQP 1.0 spec. It is some kind of extension on top, if I understand the situation correctly.