SELinux userspace release 3.2-rc1

User-visible changes

• libsepol implemented a new, more space-efficient form of storing filename
  transitions in the binary policy and reduced the size of the binary policy

• libselinux: Use mmap()'ed kernel status page instead of netlink by default.
  See "KERNEL STATUS PAGE" section in avc_init(3) for more details.
  Note: if you need to umount /sys/fs/selinux you need to use lazy umount -
  umount -l /sys/fs/selinux as the kernel status page /sys/fs/selinux/status
  stays mapped by processes like systemd, dbus, sshd.

• Tools using sepolgen, e.g. audit2allow, print extended permissions in
  hexadecimal

• sepolgen sorts extended rules like normal ones

• New log callback levels for enforcing and policy load notices -
  SELINUX_POLICYLOAD, SELINUX_SETENFORCE

• Changed userspace AVC setenforce and policy load messages to audit format.

• matchpathcon converted to selabel_lookup() - no more matchpathcon is
  deprecated warning

• libsepol and libsemanage dropped old and deprecated symbols and functions
  libsepol version was bumped to libsepol.so.2
  libsemanage version was bumped to libsemanage.so.2

• Release version for the whole project is same as for subcomponents, e.g.
  instead of 20210118 it's 3.2-rc1

• Improved man pages

• Bug fixes

Development-relevant changes

• License the CI scripts with a permissive, OSI approved license, such as MIT

• Several CI improvements

• Added configuration to build and run tests in GitHub Actions

• CI contains configuration for a Vagrant virtual machine - instructions on how
  to use it are documented at the beginning of Vagrantfile.

Packaging-relevant changes

• Both libsepol and libsemanage bumped their soname versions. Especially
  libsemanage is linked to shadow-utils and direct update might cause problems to
  buildroots. Also SETools needs to be rebuilt against libsepol.so.2

Issues fixed

• #245
• #270