Refactor mount path check and add comments
Refactor mount path check and add comments

Co-authored-by: Danail Branekov <43f82d874965b9fe2876a1a864fffde1e64d6143@gmail.com>
Signed-off-by: Georgi Sabev <cd7643e50243a10153b49cb72b4bdbf8b48cb045@gmail.com>

vdemeester/containerd,crosbymichael/containerd,containerd/containerd,estesp/containerd,dmcgowan/containerd,thaJeztah/containerd,thaJeztah/containerd,mikebrow/containerd,dmcgowan/containerd,estesp/containerd,crosbymichael/containerd,vdemeester/containerd,containerd/containerd,mikebrow/containerd