faillock: add page (#7971)

Signed-off-by: Martin Matous <m@matous.dev>
Co-authored-by: CleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>
Co-authored-by: Muhammad Falak R Wani <falakreyaz@gmail.com>

pages/linux/faillock.md

@@ -0,0 +1,16 @@
+# faillock
+
+> Display and modify authentication failure record files.
+> More information: <https://manned.org/faillock>.
+
+- List login failures of all users:
+
+`sudo faillock`
+
+- List login failures of the specified user:
+
+`sudo faillock --user {{user}}`
+
+- Reset the failure records of the specified user:
+
+`sudo faillock --user {{user}} --reset`