If a DLX is configured for an exchange, show it in the output of the info command.

• [x] add output to text rendering
• [x] add output to dot rendering
• [ ] Update SVG image in README.md

Codecov Report

Merging #38 into master will decrease coverage by 3.05%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #38      +/-   ##
==========================================
- Coverage   91.88%   88.82%   -3.06%     
==========================================
  Files          38       36       -2     
  Lines        1749     1683      -66     
==========================================
- Hits         1607     1495     -112     
- Misses         94      144      +50     
+ Partials       48       44       -4

Impacted Files	Coverage Δ
cmd/rabtap/cmd_subscribe.go	100% <100%> (ø)	:arrow_up:
pkg/rabbitmq_rest_client.go	95.8% <100%> (+1.62%)	:arrow_up:
cmd/rabtap/broker_info_renderer_text.go	97.8% <100%> (ø)	:arrow_up:
cmd/rabtap/broker_info_renderer_dot.go	98.84% <100%> (+0.15%)	:arrow_up:
cmd/rabtap/main.go	60% <0%> (-27.5%)	:arrow_down:
cmd/rabtap/cmd_publish.go	84.37% <0%> (-12.6%)	:arrow_down:
pkg/session.go	86.95% <0%> (-10.83%)	:arrow_down:
pkg/amqp_connector.go	90% <0%> (-4.74%)	:arrow_down:
cmd/rabtap/command_line.go	90.95% <0%> (-2.55%)	:arrow_down:
cmd/rabtap/cmd_tap.go	84.61% <0%> (ø)	:arrow_up:
... and 3 more

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