Yggdrasil demo updates

Squashed commit of the following:

commit 6c2c48f862c1b6f8e741c57804282eceffe02487
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 16:28:09 2020 +0100

    Add README.md

commit 5eeefdadf8e3881dd7a32559a92be49bd7ddaf47
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 10:18:50 2020 +0100

    Fix wedge in federation sender

commit e2ebffbfba25cf82378393940a613ec32bfb909f
Merge: 0883ef88 abf26c12
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 09:51:23 2020 +0100

    Merge branch 'master' into neilalexander/yggdrasil

commit 0883ef8870e340f2ae9a0c37ed939dc2ab9911f6
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Fri Jul 10 09:51:06 2020 +0100

    Adjust timeouts

commit ba2d53199910f13b60cc892debe96a962e8c9acb
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 16:34:40 2020 +0100

    Try to wake up from peers/sessions properly

commit 73f42eb494741ba5b0e0cef43654708e3c8eb399
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 15:43:38 2020 +0100

    Use TransactionWriter to reduce database lock issues on SQLite

commit 08bfe63241a18c58c539c91b9f52edccda63a611
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 12:38:02 2020 +0100

    Un-wedge federation

    Squashed commit of the following:

    commit aee933f8785e7a7998105f6090f514d18051a1bd
    Author: Neil Alexander <neilalexander@users.noreply.github.com>
    Date:   Thu Jul 9 12:22:41 2020 +0100

        Un-goroutine the goroutines

    commit 478374e5d18a3056cac6682ef9095d41352d1295
    Author: Neil Alexander <neilalexander@users.noreply.github.com>
    Date:   Thu Jul 9 12:09:31 2020 +0100

        Reduce federation sender wedges

commit 40cc62c54d9e3a863868214c48b7c18e522a4772
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Thu Jul 9 10:02:52 2020 +0100

    Handle switching in/out background more reliably

1 files changed, 7 insertions, 12 deletions

diff --git a/cmd/dendrite-demo-yggdrasil/yggconn/node.go b/cmd/dendrite-demo-yggdrasil/yggconn/node.go
index 89fb69b5..2bc300c8 100644
--- a/cmd/dendrite-demo-yggdrasil/yggconn/node.go
+++ b/cmd/dendrite-demo-yggdrasil/yggconn/node.go
@@ -55,6 +55,7 @@ type Node struct {
 	quicConfig *quic.Config
 	sessions   sync.Map // string -> quic.Session
 	incoming   chan QUICStream
+	NewSession func(remote gomatrixserverlib.ServerName)
 }
 
 func (n *Node) BuildName() string {
@@ -137,7 +138,7 @@ func Setup(instanceName, storageDirectory string) (*Node, error) {
 		MaxIncomingStreams:    0,
 		MaxIncomingUniStreams: 0,
 		KeepAlive:             true,
-		MaxIdleTimeout:        time.Second * 60,
+		MaxIdleTimeout:        time.Minute * 15,
 		HandshakeTimeout:      time.Second * 15,
 	}
 
@@ -189,7 +190,9 @@ func (n *Node) PeerCount() int {
 }
 
 func (n *Node) KnownNodes() []gomatrixserverlib.ServerName {
-	nodemap := map[string]struct{}{}
+	nodemap := map[string]struct{}{
+		"b5ae50589e50991dd9dd7d59c5c5f7a4521e8da5b603b7f57076272abc58b374": struct{}{},
+	}
 	for _, peer := range n.core.GetSwitchPeers() {
 		nodemap[hex.EncodeToString(peer.SigningKey[:])] = struct{}{}
 	}
@@ -264,18 +267,10 @@ func (n *Node) SetStaticPeer(uri string) error {
 	return nil
 }
 
-func (n *Node) NotifyLinkNew(f func(boxPubKey crypto.BoxPubKey, linkType, remote string)) {
+func (n *Node) NotifyLinkNew(f func(boxPubKey crypto.BoxPubKey, sigPubKey crypto.SigPubKey, linkType, remote string)) {
 	n.core.NotifyLinkNew(f)
 }
 
-func (n *Node) NotifyLinkGone(f func(boxPubKey crypto.BoxPubKey, linkType, remote string)) {
+func (n *Node) NotifyLinkGone(f func(boxPubKey crypto.BoxPubKey, sigPubKey crypto.SigPubKey, linkType, remote string)) {
 	n.core.NotifyLinkGone(f)
 }
-
-func (n *Node) NotifySessionNew(f func(boxPubKey crypto.BoxPubKey)) {
-	n.core.NotifySessionNew(f)
-}
-
-func (n *Node) NotifySessionGone(f func(boxPubKey crypto.BoxPubKey)) {
-	n.core.NotifySessionGone(f)
-}