Fixed some typos, courtesy of codespell

Main change is the conversion from the British cancelling/-ed to the
American canceling/-ed.

src/libtls/tls_eap.c

@@ -323,7 +323,7 @@ static chunk_t create_ack(private_tls_eap_t *this)
 		default:
 			break;
 	}
-	DBG2(DBG_TLS, "sending %N acknowledgement packet",
+	DBG2(DBG_TLS, "sending %N acknowledgment packet",
 		 eap_type_names, this->type);
 	return chunk_clone(chunk_from_thing(pkt));
 }
@@ -370,7 +370,7 @@ METHOD(tls_eap_t, process, status_t,
 	{
 		if (in.len == sizeof(eap_tls_packet_t))
 		{
-			DBG2(DBG_TLS, "received %N acknowledgement packet",
+			DBG2(DBG_TLS, "received %N acknowledgment packet",
 				 eap_type_names, this->type);
 			status = build_pkt(this, out);
 			if (status == INVALID_STATE && this->tls->is_complete(this->tls))

src/libtls/tls_hkdf.c

@@ -735,7 +735,7 @@ tls_hkdf_t *tls_hkdf_create(hash_algorithm_t hash_algorithm, chunk_t psk)
 			DBG1(DBG_TLS, "%N not supported", hash_algorithm_names,
 				 hash_algorithm);
 		}
-		DBG1(DBG_TLS, "unable to initialise HKDF");
+		DBG1(DBG_TLS, "unable to initialize HKDF");
 		destroy(this);
 		return NULL;
 	}