Fix typos found by https://github.com/crate-ci/typos (#735)

control.go

@@ -61,7 +61,7 @@ func (c *Control) Start() {
 
 // Stop signals nebula to shutdown, returns after the shutdown is complete
 func (c *Control) Stop() {
-	// Stop the handshakeManager (and other serivces), to prevent new tunnels from
+	// Stop the handshakeManager (and other services), to prevent new tunnels from
 	// being created while we're shutting them all down.
 	c.cancel()
 

handshake_manager.go

@@ -147,7 +147,7 @@ func (c *HandshakeManager) handleOutbound(vpnIp iputil.VpnIp, f udp.EncWriter, l
 
 	// Get a remotes object if we don't already have one.
 	// This is mainly to protect us as this should never be the case
-	// NB ^ This comment doesn't jive. It's how the thing gets intiailized.
+	// NB ^ This comment doesn't jive. It's how the thing gets initialized.
 	// It's the common path. Should it update every time, in case a future LH query/queries give us more info?
 	if hostinfo.remotes == nil {
 		hostinfo.remotes = c.lightHouse.QueryCache(vpnIp)

outside.go

@@ -93,7 +93,7 @@ func (f *Interface) readOutsidePackets(addr *udp.Addr, via interface{}, out []by
 				hostinfo.logger(f.l).WithField("hostinfo", hostinfo.vpnIp).WithField("remoteIndex", h.RemoteIndex).Errorf("HostInfo missing remote index")
 				// Delete my local index from the hostmap
 				f.hostMap.DeleteRelayIdx(h.RemoteIndex)
-				// When the peer doesn't recieve any return traffic, its connection_manager will eventually clean up
+				// When the peer doesn't receive any return traffic, its connection_manager will eventually clean up
 				// the broken relay when it cleans up the associated HostInfo object.
 				return
 			}

ssh.go

@@ -805,7 +805,7 @@ func sshPrintRelays(ifce *Interface, fs interface{}, a []string, w sshd.StringWr
 				case TerminalType:
 					t = "terminal"
 				default:
-					t = "unkown"
+					t = "unknown"
 				}
 
 				s := ""

stats.go

@@ -18,7 +18,7 @@ import (
 	"github.com/slackhq/nebula/config"
 )
 
-// startStats initializes stats from config. On success, if any futher work
+// startStats initializes stats from config. On success, if any further work
 // is needed to serve stats, it returns a func to handle that work. If no
 // work is needed, it'll return nil. On failure, it returns nil, error.
 func startStats(l *logrus.Logger, c *config.C, buildVersion string, configTest bool) (func(), error) {