Recursive propagation flags should be legal to use
Recursive propagation flags should be legal to use

Current root propagation code does not allow rslave, rshared, runbindable and rprivate.
These are all legal proagations and should be allowed.

Also added the "bad" propagation flag to the error to make diagnosis easier.
Signed-off-by: Daniel J Walsh <7800de746fd39599bc46177380ea6aede7e31e16@redhat.com>

opencontainers/runtime-tools,liangchenye/ocitools,wking/ocitools-v2,liangchenye/ocitools,wking/ocitools-v2,opencontainers/runtime-tools,opencontainers/ocitools,opencontainers/ocitools