add possibity to delete policy without index
add possibity to delete policy without index

security policy can be identified with direction, selector and security context
too. Therefore the code to append approptiate data to delete message is added.

HolyShitMan/libnl-1,HolyShitMan/libnl-1,HolyShitMan/libnl-1,HolyShitMan/libnl-1