We were implicitly using proc:mixed to mount /proc/sys as read-only.
Without the automount the whole /proc was mounted as read-write which
we want to avoid.
I'm unable to replicate the proc:mixed logic with lxc.mount.entry
so revert this change until a solution is found.
This reverts commit
f5543df68651277042b156f19f5b3804c297f2a7.
Fixes: #642
lxc.cap.keep = audit_control sys_nice wake_alarm setpcap setgid setuid sys_ptrace sys_admin wake_alarm block_suspend sys_time net_admin net_raw net_bind_service kill dac_override dac_read_search fsetid mknod syslog chown sys_resource fowner ipc_lock sys_chroot
-lxc.mount.auto = cgroup:ro sys:ro
-lxc.mount.entry = proc proc proc nodev,nosuid,noexec,hidepid=2 0 0
+lxc.mount.auto = cgroup:ro sys:ro proc
lxc.console.path = none