This is not intended for upstream inclusion. It implements a bus method
(GetConnectionAppArmorSecurityContext) to get a connection's AppArmor
security context but upstream D-Bus has recently added a generic way of
getting a connection's security credentials (GetConnectionCredentials).
Ubuntu should carry this patch until packages in the archive are moved
over to the new, generic method of getting a connection's credentials.

[Altered by Simon McVittie: survive non-UTF-8 contexts which
would otherwise be a local denial of service, except that Ubuntu
inherits a non-fatal warnings patch from Debian; new commit message
taken from the Ubuntu changelog; do not emit unreachable code if
AppArmor is disabled.]