Modify path for arping in netutils.fc to match both bin and sbin

[zpytela]

In iputils newer than iputils-20180629 the arping command moved from
/sbin to /bin, hence the path in the netutils.fc file needs to be
adjusted so that it matches both possible paths for the actual file.
Symlink can have bin_t assigned.

Resolves: rhbz#1820191

[zpytela]

Applicable to F31 and newer.

[wrabcak]

I'm confused by commit msg. You want to label /bin/arping as netutils_exec_t and keep /sbin/arping labeled as bin_t ?
If yes, then it's confusing also in netutils.fc file because you're trying to label /sbin/arping and /bin/arping as netutils_exec_t but specifying only files (not symlink therefore /bin/arping is bin_t). Do I understand it correctly?

[zpytela]

The goal was to label plain files regardless of iputils version and therefore regardless of the path. Symlinks are correct to have the default bin_t.

[wrabcak]

Good. Just to complete the msg: domain attribute can read symlinks labeled as bin_t . So there is no need to allow it for netutils_t .

LGTM.
Thanks.