MAINTAINERS: Add bug tracking system location entry type

Following the kernel Bugzilla discussion during the Kernel Summit
(https://lwn.net/Articles/705245/), add bug tracking system location
entry type (B) to MAINTAINERS and populate it for several subsystems
known to be using the kernel BZ actively (and add the upstream BZ for
ACPICA too).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -77,6 +77,7 @@ Descriptions of section entries:
 	Q: Patchwork web based patch tracking system site
 	T: SCM tree type and location.
 	   Type is one of: git, hg, quilt, stgit, topgit
+	B: Bug tracking system location.
 	S: Status, one of the following:
 	   Supported:	Someone is actually paid to look after this.
 	   Maintained:	Someone actually looks after it.
@@ -281,6 +282,7 @@ L:	linux-acpi@vger.kernel.org
 W:	https://01.org/linux-acpi
 Q:	https://patchwork.kernel.org/project/linux-acpi/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+B:	https://bugzilla.kernel.org
 S:	Supported
 F:	drivers/acpi/
 F:	drivers/pnp/pnpacpi/
@@ -304,6 +306,8 @@ W:	https://acpica.org/
 W:	https://github.com/acpica/acpica/
 Q:	https://patchwork.kernel.org/project/linux-acpi/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+B:	https://bugzilla.kernel.org
+B:	https://bugs.acpica.org
 S:	Supported
 F:	drivers/acpi/acpica/
 F:	include/acpi/
@@ -313,6 +317,7 @@ ACPI FAN DRIVER
 M:	Zhang Rui <rui.zhang@intel.com>
 L:	linux-acpi@vger.kernel.org
 W:	https://01.org/linux-acpi
+B:	https://bugzilla.kernel.org
 S:	Supported
 F:	drivers/acpi/fan.c
 
@@ -328,13 +333,15 @@ ACPI THERMAL DRIVER
 M:	Zhang Rui <rui.zhang@intel.com>
 L:	linux-acpi@vger.kernel.org
 W:	https://01.org/linux-acpi
+B:	https://bugzilla.kernel.org
 S:	Supported
 F:	drivers/acpi/*thermal*
 
 ACPI VIDEO DRIVER
 M:	Zhang Rui <rui.zhang@intel.com>
 L:	linux-acpi@vger.kernel.org
 W:	https://01.org/linux-acpi
+B:	https://bugzilla.kernel.org
 S:	Supported
 F:	drivers/acpi/acpi_video.c
 
@@ -5663,6 +5670,7 @@ HIBERNATION (aka Software Suspend, aka swsusp)
 M:	"Rafael J. Wysocki" <rjw@rjwysocki.net>
 M:	Pavel Machek <pavel@ucw.cz>
 L:	linux-pm@vger.kernel.org
+B:	https://bugzilla.kernel.org
 S:	Supported
 F:	arch/x86/power/
 F:	drivers/base/power/
@@ -9624,6 +9632,7 @@ POWER MANAGEMENT CORE
 M:	"Rafael J. Wysocki" <rjw@rjwysocki.net>
 L:	linux-pm@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+B:	https://bugzilla.kernel.org
 S:	Supported
 F:	drivers/base/power/
 F:	include/linux/pm.h
@@ -11613,6 +11622,7 @@ M:	"Rafael J. Wysocki" <rjw@rjwysocki.net>
 M:	Len Brown <len.brown@intel.com>
 M:	Pavel Machek <pavel@ucw.cz>
 L:	linux-pm@vger.kernel.org
+B:	https://bugzilla.kernel.org
 S:	Supported
 F:	Documentation/power/
 F:	arch/x86/kernel/acpi/