4 space indentation with a mix of tabs and spaces is a hassle. Update
to project-standard hard-tabs with 8-space indentation in these files.
This matches the new code coming in better as well.
Always free dev and fstyp before strduping new values to assign to
them. Free them at the end of the loop. This keeps them from leaking
for mal-formed /etc/fstab lines.
CID: 1007777, 1007778, 1007779
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