Motivation:
At the moment resolving addresses during connect is done via setting an AddressResolverGroup on the Bootstrap. While this works most of the times as expected sometimes the user want to trigger the connect() from the Channel itself and not via the Bootstrap. For this cases we should provide a ChannelHandler that the user can use that will do the resolution.
Modifications:
Add ResolveAddressHandler and tests
Result:
Be able to resolve addresses without Bootstrap
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