docs: security: move some books to it and update

2019-07-15T14:03:01Z

The following files belong to security: Documentation/security/LSM.rst -> Documentation/security/lsm-development.rst Documentation/lsm.txt -> Documentation/security/lsm.rst Documentation/SAK.txt -> Documentation/security/sak.rst Documentation/siphash.txt -> Documentation/security/siphash.rst Signed-off-by: Mauro Carvalho Chehab

wireguard-linux/Documentation/security/lsm-development.rst, branch jd/unified-crypt-queue

docs: security: move some books to it and update