Fix spelling

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Haakan T Johansson <f96hajo@chalmers.se>
Closes #5547 
Closes #5543

cmd/zed/agents/zfs_agents.c

@@ -217,7 +217,7 @@ zfs_agent_dispatch(const char *class, const char *subclass, nvlist_t *nvl)
 	 * On illumos these subscriptions reside in:
 	 * 	/usr/lib/fm/fmd/plugins/zfs-retire.conf
 	 *
-	 * NOTE: faults events come directy from our diagnosis engine
+	 * NOTE: faults events come directly from our diagnosis engine
 	 * and will not pass through the zfs kernel module.
 	 */
 	if (strcmp(class, FM_LIST_SUSPECT_CLASS) == 0 ||

cmd/zed/agents/zfs_mod.c

@@ -477,7 +477,7 @@ zfs_iter_vdev(zpool_handle_t *zhp, nvlist_t *nvl, void *data)
 	} else if (dp->dd_compare != NULL) {
 		/*
 		 * NOTE: On Linux there is an event for partition, so unlike
-		 * illumos, substring matching is not required to accomodate
+		 * illumos, substring matching is not required to accommodate
 		 * the partition suffix. An exact match will be present in
 		 * the dp->dd_compare value.
 		 */

cmd/zed/zed_disk_event.c

@@ -185,7 +185,7 @@ zed_udev_monitor(void *arg)
 		pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
 
 		/*
-		 * Strongly typed device is the prefered filter
+		 * Strongly typed device is the preferred filter
 		 */
 		type = udev_device_get_property_value(dev, "ID_FS_TYPE");
 		if (type != NULL && type[0] != '\0') {

cmd/zed/zed_exec.c

@@ -71,7 +71,7 @@ _zed_exec_create_env(zed_strings_t *zsp)
 
 /*
  * Fork a child process to handle event [eid].  The program [prog]
- * in directory [dir] is executed with the envionment [env].
+ * in directory [dir] is executed with the environment [env].
  *
  * The file descriptor [zfd] is the zevent_fd used to track the
  * current cursor location within the zevent nvlist.