relevant changes:
- swarmkit#2815 Extension and resource API declarations
- swarmkit#2816 Moving swap options into `ResourceRequirements` instead of `ContainerSpec`s
- relates to moby#37872
- swarmkit#2821 allocator: use a map for network-IDs to prevent O(n2)
- swarmkit#2832 [api] Add created object to return types for extension and resource create apis
- swarmkit#2831 [controlapi] Extension api implementation
- swarmkit#2835 Resource controlapi Implemetation
- swarmkit#2802 Use custom gRPC dialer to override default proxy dialer
- addresses moby#35395 Swarm worker cannot connect to master if proxy is configured
- addresses moby#issues/36951 Swarm nodes cannot join as masters if http proxy is set
- relates to swarmkit#2419 Provide custom gRPC dialer to override default proxy dialer
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
