netfilter: fix several typos in comments

Fix typos reported by scripts/checkpatch.pl using the misspelling list
in scripts/spelling.txt. Only touches comments, no code changes.

Assisted-by: Cursor:claude-opus-5
Signed-off-by: Hemanth Selam <hemanth.selam@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/ipv4/netfilter/arp_tables.c

@@ -58,7 +58,7 @@ static inline int arp_devaddr_compare(const struct arpt_devaddr_info *ap,
 /*
  * Unfortunately, _b and _mask are not aligned to an int (or long int)
  * Some arches dont care, unrolling the loop is a win on them.
- * For other arches, we only have a 16bit alignement.
+ * For other arches, we only have a 16bit alignment.
  */
 static unsigned long ifname_compare(const char *_a, const char *_b, const char *_mask)
 {

net/netfilter/ipset/ip_set_core.c

@@ -1426,7 +1426,7 @@ static int ip_set_swap(struct sk_buff *skb, const struct nfnl_info *info,
 		return -IPSET_ERR_EXIST_SETNAME2;
 
 	/* Features must not change.
-	 * Not an artifical restriction anymore, as we must prevent
+	 * Not an artificial restriction anymore, as we must prevent
 	 * possible loops created by swapping in setlist type of sets.
 	 */
 	if (!(from->type->features == to->type->features &&

net/netfilter/ipvs/ip_vs_sync.c

@@ -1344,7 +1344,7 @@ static void set_mcast_pmtudisc(struct sock *sk, int val)
 }
 
 /*
- *      Specifiy default interface for outgoing multicasts
+ *      Specify default interface for outgoing multicasts
  */
 static int set_mcast_if(struct sock *sk, struct net_device *dev)
 {

tools/testing/selftests/net/netfilter/conntrack_icmp_related.sh

@@ -171,7 +171,7 @@ table inet filter {
 }
 EOF
 
-# make sure NAT core rewrites adress of icmp error if nat is used according to
+# make sure NAT core rewrites address of icmp error if nat is used according to
 # conntrack nat information (icmp error will be directed at nsrouter1 address,
 # but it needs to be routed to nsclient1 address).
 ip netns exec "$nsrouter1" nft -f - <<EOF