AppArmor: export known rlimit names/value mappings in securityfs

Since the parser needs to know which rlimits are known to the kernel,
export the list via a mask file in the "rlimit" subdirectory in the
securityfs "features" directory.

Signed-off-by: Kees Cook <kees@ubuntu.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

diff --cc security/apparmor/Makefile
Simple merge

diff --cc security/apparmor/apparmorfs.c
Simple merge

diff --cc security/apparmor/include/resource.h
Simple merge

diff --cc security/apparmor/resource.c
Simple merge