seccomp: ppoll, NTS logging

[Hal Murray]

I just pushed a fix/change in seccomp.  It broke recently in Fedora 31.  ppoll 
doesn't work anymore.  The comment said Arch but my Arch box works without it. 
 I commented it out and haven't found any distro that uses it.  Please test.


I also pushed some work on NTS logging.  The normal worked-OK case is now 1 
line.  So are the common bad cases.  It's currently using magic constants.  
I'm going to try to clean that up.

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