MAINTAINERS: change hardening mailing list

As more email from git history gets aimed at the OpenWall
kernel-hardening@ list, there has been a desire to separate "new topics"
from "on-going" work.

To handle this, the superset of hardening email topics are now to be
directed to linux-hardening@vger.kernel.org.

Update the MAINTAINERS file and the .mailmap to accomplish this, so that
linux-hardening@ can be treated like any other regular upstream kernel
development list.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Emese Revfy <re.emese@gmail.com>
Cc: "Tobin C. Harding" <me@tobin.cc>
Cc: Tycho Andersen <tycho@tycho.pizza>
Cc: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/linux-hardening/202010051443.279CC265D@keescook/
Link: https://lkml.kernel.org/r/20201006000012.2768958-1-keescook@chromium.orgSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

.mailmap

@@ -188,6 +188,7 @@ Leon Romanovsky <leon@kernel.org> <leonro@nvidia.com>
 Linas Vepstas <linas@austin.ibm.com>
 Linus Lüssing <linus.luessing@c0d3.blue> <linus.luessing@ascom.ch>
 Linus Lüssing <linus.luessing@c0d3.blue> <linus.luessing@web.de>
+<linux-hardening@vger.kernel.org> <kernel-hardening@lists.openwall.com>
 Li Yang <leoyang.li@nxp.com> <leoli@freescale.com>
 Li Yang <leoyang.li@nxp.com> <leo@zh-kernel.org>
 Lukasz Luba <lukasz.luba@arm.com> <l.luba@partner.samsung.com>

MAINTAINERS

@@ -7240,7 +7240,7 @@ F:	drivers/staging/gasket/
 GCC PLUGINS
 M:	Kees Cook <keescook@chromium.org>
 R:	Emese Revfy <re.emese@gmail.com>
-L:	kernel-hardening@lists.openwall.com
+L:	linux-hardening@vger.kernel.org
 S:	Maintained
 F:	Documentation/kbuild/gcc-plugins.rst
 F:	scripts/Makefile.gcc-plugins
@@ -9802,7 +9802,7 @@ F:	drivers/scsi/53c700*
 LEAKING_ADDRESSES
 M:	Tobin C. Harding <me@tobin.cc>
 M:	Tycho Andersen <tycho@tycho.pizza>
-L:	kernel-hardening@lists.openwall.com
+L:	linux-hardening@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tobin/leaks.git
 F:	scripts/leaking_addresses.pl