Improve UPnP implementation

• Better handling of connectivity change
• Better handling of various router events
• Attempt to improve latency/binding time/explore avoiding blocking operations

TODO

1. Add minipnp into the daemon code base
2. Verify that the connection is working well in a call
3. Verify that ipv6 is working
4. Do eventloop (preferred) or polling

changed milestone to %Iteration 6

changed the description

changed due date to May 22, 2019

added enhancement label

added SprintIn progress label

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mentioned in commit 852bd075

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removed due date

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Refactor is complete. Refer to git message for detailed explanation of new structure.

changed milestone to %Iteration 12

changed milestone to %Iteration 13

added SprintTo review label

removed SprintIn progress label

mentioned in commit 60515d89

added SprintDone label and removed SprintTo review label

assigned to @mchibani1

removed milestone

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mentioned in issue #290 (closed)

added connectivity label

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unassigned @eabitbol

unassigned @mchibani1

added to epic &22

closed