Fix typos

Found via `codespell -L shs,hastable,userr`

Author: kianmeng

docs/about/faq.md

@@ -76,7 +76,7 @@ new "world map" is created for every node in the network.
 This means that under certain conditions, Headscale can likely handle 100s
 of devices (maybe more), if there is _little to no change_ happening in the
 network. For example, in Scenario 1, the process of computing the world map is
-extremly demanding due to the size of the network, but when the map has been
+extremely demanding due to the size of the network, but when the map has been
 created and the nodes are not changing, the Headscale instance will likely
 return to a very low resource usage until the next time there is an event
 requiring the new map.

hscontrol/db/db.go

@@ -496,7 +496,7 @@ func NewHeadscaleDatabase(
 				ID: "202407191627",
 				Migrate: func(tx *gorm.DB) error {
 					// Fix an issue where the automigration in GORM expected a constraint to
-					// exists that didnt, and add the one it wanted.
+					// exists that didn't, and add the one it wanted.
 					// Fixes https://github.com/juanfont/headscale/issues/2351
 					if cfg.Type == types.DatabasePostgres {
 						err := tx.Exec(`
@@ -934,7 +934,7 @@ AND auth_key_id NOT IN (
 			},
 			// From this point, the following rules must be followed:
 			// - NEVER use gorm.AutoMigrate, write the exact migration steps needed
-			// - AutoMigrate depends on the struct staying exactly the same, which it wont over time.
+			// - AutoMigrate depends on the struct staying exactly the same, which it won't over time.
 			// - Never write migrations that requires foreign keys to be disabled.
 		},
 	)

hscontrol/policy/v2/types_test.go

@@ -412,7 +412,7 @@ func TestUnmarshalPolicy(t *testing.T) {
 `,
 			wantErr: `Hostname "derp" contains an invalid IP address: "10.0/42"`,
 		},
-		// TODO(kradalby): Figure out why this doesnt work.
+		// TODO(kradalby): Figure out why this doesn't work.
 		// 		{
 		// 			name: "invalid-hostname",
 		// 			input: `
@@ -1074,7 +1074,7 @@ func TestResolvePolicy(t *testing.T) {
 					ForcedTags: []string{"tag:anything"},
 					IPv4:       ap("100.100.101.2"),
 				},
-				// not matchin pak tag
+				// not matching pak tag
 				{
 					User: users["testuser"],
 					AuthKey: &types.PreAuthKey{
@@ -1108,7 +1108,7 @@ func TestResolvePolicy(t *testing.T) {
 					ForcedTags: []string{"tag:anything"},
 					IPv4:       ap("100.100.101.5"),
 				},
-				// not matchin pak tag
+				// not matching pak tag
 				{
 					User: users["groupuser"],
 					AuthKey: &types.PreAuthKey{
@@ -1147,7 +1147,7 @@ func TestResolvePolicy(t *testing.T) {
 					ForcedTags: []string{"tag:anything"},
 					IPv4:       ap("100.100.101.10"),
 				},
-				// not matchin pak tag
+				// not matching pak tag
 				{
 					AuthKey: &types.PreAuthKey{
 						Tags: []string{"tag:alsotagged"},
@@ -1159,7 +1159,7 @@ func TestResolvePolicy(t *testing.T) {
 					ForcedTags: []string{"tag:test"},
 					IPv4:       ap("100.100.101.234"),
 				},
-				// not matchin pak tag
+				// not matching pak tag
 				{
 					AuthKey: &types.PreAuthKey{
 						Tags: []string{"tag:test"},

hscontrol/routes/primary.go

@@ -38,7 +38,7 @@ func New() *PrimaryRoutes {
 // updatePrimaryLocked recalculates the primary routes and updates the internal state.
 // It returns true if the primary routes have changed.
 // It is assumed that the caller holds the lock.
-// The algorthm is as follows:
+// The algorithm is as follows:
 // 1. Reset the primaries map.
 // 2. Iterate over the routes and count the number of times a prefix is advertised.
 // 3. If a prefix is advertised by at least two nodes, it is a primary route.

integration/route_test.go

@@ -1334,10 +1334,10 @@ func TestSubnetRouterMultiNetworkExitNode(t *testing.T) {
 	web := services[0]
 	webip := netip.MustParseAddr(web.GetIPInNetwork(usernet1))
 
-	// We cant mess to much with ip forwarding in containers so
+	// We can't mess to much with ip forwarding in containers so
 	// we settle for a simple ping here.
 	// Direct is false since we use internal DERP which means we
-	// cant discover a direct path between docker networks.
+	// can't discover a direct path between docker networks.
 	err = user2c.Ping(webip.String(),
 		tsic.WithPingUntilDirect(false),
 		tsic.WithPingCount(1),
@@ -1693,7 +1693,7 @@ func TestAutoApproveMultiNetwork(t *testing.T) {
 					// with an additional tsOpt which advertises the route as part
 					// of the `tailscale up` command. If we do this as part of the
 					// scenario creation, it will be added to all nodes and turn
-					// into a HA node, which isnt something we are testing here.
+					// into a HA node, which isn't something we are testing here.
 					routerUsernet1, err := scenario.CreateTailscaleNode("head", tsOpts...)
 					require.NoError(t, err)
 					defer routerUsernet1.Shutdown()

integration/tsic/tsic.go

@@ -202,7 +202,7 @@ func WithExtraLoginArgs(args []string) Option {
 	}
 }
 
-// WithAcceptRoutes tells the node to accept incomming routes.
+// WithAcceptRoutes tells the node to accept incoming routes.
 func WithAcceptRoutes() Option {
 	return func(tsic *TailscaleInContainer) {
 		tsic.withAcceptRoutes = true