util: get rid of virGetEnv{Allow,Block}SUID functions
Now that 100% of libvirt code is forbidden in a SUID environment, we no longer need to worry about whether env variables are trustworthy or not. The virt-login-shell setuid program, which does not link to any libvirt code, will purge all environment variables, except $TERM, before invoking the virt-login-shell-helper program which uses libvirt. Reviewed-by: NMichal Privoznik <mprivozn@redhat.com> Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>
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