Fix some typos in code comment

server/auth.go

@@ -1078,7 +1078,7 @@ URLS:
 		}
 		hostLabels := strings.Split(strings.ToLower(url.Hostname()), ".")
 		// Following https://tools.ietf.org/html/rfc6125#section-6.4.3, should not => will not, may => will not
-		// The wilcard * never matches multiple label and only matches the left most label.
+		// The wildcard * never matches multiple label and only matches the left most label.
 		if len(hostLabels) != len(dnsAltNameLabels) {
 			continue URLS
 		}

server/client.go

@@ -387,7 +387,7 @@ type readCache struct {
 	rsz int32 // Read buffer size
 	srs int32 // Short reads, used for dynamic buffer resizing.
 
-	// These are for readcache flags to avoind locks.
+	// These are for readcache flags to avoid locks.
 	flags readCacheFlag
 
 	// Capture the time we started processing our readLoop.

server/events.go

@@ -270,7 +270,7 @@ func newPubMsg(c *client, sub, rply string, si *ServerInfo, hdr map[string]strin
 	} else {
 		m = &pubMsg{}
 	}
-	// When getting something from a pool it is criticical that all fields are
+	// When getting something from a pool it is critical that all fields are
 	// initialized. Doing this way guarantees that if someone adds a field to
 	// the structure, the compiler will fail the build if this line is not updated.
 	(*m) = pubMsg{c, sub, rply, si, hdr, msg, oct, echo, last}

server/gateway.go

@@ -1320,7 +1320,7 @@ func (s *Server) processGatewayInfoFromRoute(info *Info, routeSrvID string, rout
 
 // Sends INFO protocols to the given route connection for each known Gateway.
 // These will be processed by the route and delegated to the gateway code to
-// imvoke processImplicitGateway.
+// invoke processImplicitGateway.
 func (s *Server) sendGatewayConfigsToRoute(route *client) {
 	gw := s.gateway
 	gw.RLock()