#154 restore -rN tries to lchown() links

[Sami Liedes]

Related to #2963272, but for lchmod() instead of lxsetattr().

Example run:
# restore -xN -f file.dump
restore: ./var/lib/postgresql: lchown: No such file or directory
[... similar errors about all(?) symlinks]

[Sami Liedes]

After more testing, I also get warnings saying "ftruncate: Invalid argument".