openbsm: Remove $FreeSBD$ tags from the configuration files

[gbe]

Summary

In e61dc6cac4001f1abfc48ee27e4e623c2c044fa8 the configuration
files were taken off the vendor branch to help mergemaster
comparing them.

Since mergemaster will be deprecated and $FreeBSD$ tags aren't
used anymore, remove them.

While here, sync audit_filter with upstream commit 5e6da76 (typo).

Test Plan

make buildworld

[imp]

Have you confirmed that this makes these files now match upstream?

[gbe]

In D44318#1010841, @imp wrote:

Have you confirmed that this makes these files now match upstream?

I only have compared the head of the files, but I haven't done a full comparison regarding their content. But that's a good point, I will make a comparison,
as soon as I find the time.

[gbe]

• Sync audit_event and audit_filter with OpenBSM

[gbe]

@imp I just compared the upstream, there was only one typo (upstream commit 5e6da76 ) in audit_filter we didn't imported.