GitLab

- updated go-ctxgroup and goprocess
ctxgroup: AddChildGroup was changed to AddChild. Used in two files:
- p2p/net/mock/mock_net.go
- routing/dht/dht.go

- updated context from hg repo to git
prev. commit in hg was ad01a6fcc8a19d3a4478c836895ffe883bd2ceab. (context: make parentCancelCtx iterative)
represents commit 84f8955a887232b6308d79c68b8db44f64df455c in git repo

- updated context to master (b6fdb7d8a4ccefede406f8fe0f017fb58265054c)

Aaron Jacobs (2):
net/context: Don't accept a context in the DoSomethingSlow example.
context: Be clear that users must cancel the result of WithCancel.

Andrew Gerrand (1):
go.net: use golang.org/x/... import paths

Bryan C. Mills (1):
net/context: Don't leak goroutines in Done example.

Damien Neil (1):
context: fix removal of cancelled timer contexts from parent

David Symonds (2):
context: Fix WithValue example code.
net: add import comments.

Sameer Ajmani (1):
context: fix TestAllocs to account for ints in interfaces

We were half-way with this. there's no way for net.Dialers
to respect contexts, so we have to let the dial finish in
the background.

thanks @whyrusleeping for finding these.

Use of the ratelimiter should be conscious of the ratelimiter's
potential closing. any loops that add work to ratelimiter
should (a) only do so if the rate limiter is not closed,
or (b) prevent limiter while work is added
(i.e. use limiter.Go(addWorkHere))

- time them out (already was doing that with addrbook)
- keep count to counter symmetric nats

Let's save log.Error for things the user can take action on.
Moved all our diagnostics to log.Debug. We can ideally reduce them
even further.

TODOs:
- need to consolidate all the versioning stuff into one package
- need to do the version check as a handshake, before further
  communication happens. we used to do this.

so that we dont get stuck dialing bad addrs first always.

This will mitigate the fd explosion, but slow down dials majorly
as any peer with more addresses than the rate limit will have
to wait a whole dial timeout (~15s)

This addr manager should seriously help with the addrsplosion
problem.

this commit moves management of the nat to its own object.
perhaps this can be general enough to work with any host
(not just BasicHost), but for now keeping here.

the nat manager:
- discovers and sets up the nat asynchronously.
- adds any port mappings necessary if/after nat has been found.
- listens to the network Listen() changes, adding/closing mappings

After this commit, client can close individual mappings (without
closing the whole NAT)

Network now signals when it successfully listens on some address
or when an address shuts down. This will be used to establish and
close nat port mappings. It could also be used to notify peers
of address changes.

p2p/net: network interface Listen func

network interface now allows setting Listeners after the fact.
This is useful to create the network and start listening as
separate steps. And to keep the network up to date on new
addresses the node might have to listen to.

network interface now allows setting Listeners after the fact.
This is useful to create the network and start listening as
separate steps. And to keep the network up to date on new
addresses the node might have to listen to.

dialing 4000 connections somehow keeps choking both travis and
jenkins. dialing this down to 500

- attempts set to 1 now.
- timeouts must account for that.

p2p/net: dial log -> events