Add a simple test case that writes random garbage to (almost) every sysctl node.
This test reproduced already at least five unique panics in a few quick runs.
The test is skipped by default as it is not likely safe even without the panics.

Test that sysctl(8) does not segfault, as reported by pgoyette@ on current
users.

branches: 1.1.4;
Add a test case for PR kern/44946. This tests that common first level sysctl
nodes (ddb, hw, machdep, etc.) are not writable by a normal user.

When deadbeef is treated as a 32-bit signed integer, it actually has a
negative value. So, if the value gets written into a sysctl variable,
and then is read back, the twos-complement value is displayed.

So, when checking for the value having been written, make sure we check
for the correct value!

Move more PR references from comments to ATF's "descr".

Remove xfail, as PR kern/44946 was fixed.

branches: 1.4.4;
Remove shebang lines from test-script sources; avoids duplicate with
the build process which adds one too.

Do also a small functional verification that user did not succeed in writing
garbage values, even if sysctl(8) reported a failure.

Add one missing cleanup routine declaration.

Add a test case for PR kern/44946. This tests that common first level sysctl
nodes (ddb, hw, machdep, etc.) are not writable by a normal user.

Use the new "run_unsafe" atf_config_get() option also with a couple of other
tests that are known to be unsafe.

Skip these also for Qemu runs as they cause panics. Point to PR kern/55451.

Skip a few more nodes, and enable this test for Qemu runs.

Add a simple test case that writes random garbage to (almost) every sysctl node.
This test reproduced already at least five unique panics in a few quick runs.
The test is skipped by default as it is not likely safe even without the panics.

Added test of -d option to sysctl

branches: 1.1.2; 1.1.4; 1.1.10;
Test that sysctl(8) does not segfault, as reported by pgoyette@ on current
users.