nodedev: remove use of the term 'blacklist' from enumeration code

The term "ignored" is a better choice for the filtering performed
on devices from udev.
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

src/node_device/node_device_udev.c

@@ -1397,7 +1397,7 @@ udevProcessDeviceListEntry(struct udev *udev,
  * Do not bother enumerating over subsystems that do not
  * contain interesting devices.
  */
-const char *subsystem_blacklist[] = {
+const char *subsystem_ignored[] = {
     "acpi", "tty", "vc", "i2c",
 };
 
@@ -1406,8 +1406,8 @@ udevEnumerateAddMatches(struct udev_enumerate *udev_enumerate)
 {
     size_t i;
 
-    for (i = 0; i < G_N_ELEMENTS(subsystem_blacklist); i++) {
-        const char *s = subsystem_blacklist[i];
+    for (i = 0; i < G_N_ELEMENTS(subsystem_ignored); i++) {
+        const char *s = subsystem_ignored[i];
         if (udev_enumerate_add_nomatch_subsystem(udev_enumerate, s) < 0) {
             virReportSystemError(errno, "%s", _("failed to add susbsystem filter"));
             return -1;