Duplication of sysctl default parameter fs.protected_hardlinks and fs.protected_symlinks

[BenjaminBoehm]

It seems that some sysctl default parameters are defined multiple times.
This generates this error:

[WARNING]: While constructing a mapping from ~/ansible_collections/devsec/hardening/roles/os_hardening/defaults/main.yml, line 70, column 3, found a duplicate dict key (fs.protected_hardlinks). Using last defined value only.
[WARNING]: While constructing a mapping from ~/ansible_collections/devsec/hardening/roles/os_hardening/defaults/main.yml, line 70, column 3, found a duplicate dict key (fs.protected_symlinks). Using last defined value only.

We can keep:

ansible-collection-hardening/roles/os_hardening/defaults/main.yml

Lines 67 to 71 in 8a385b8

	# These settings eliminate an entire class of security vulnerabilities:
	# time-of-check-time-of-use cross-privilege attacks using guessable
	# filenames (generally seen as "/tmp file race" vulnerabilities).
	fs.protected_hardlinks: 1
	fs.protected_symlinks: 1

and delete:

ansible-collection-hardening/roles/os_hardening/defaults/main.yml

Lines 296 to 297 in 8a385b8

	# Restrict hardlink creation behavior
	fs.protected_hardlinks: 1

ansible-collection-hardening/roles/os_hardening/defaults/main.yml

Lines 300 to 301 in 8a385b8

	# Restrict symlink following behavior
	fs.protected_symlinks: 1

If that is what we should do, I can create a PR.

[rndmh3ro]

A PR would be great, thanks!

[rndmh3ro]

Closed by #505