[Bug 263165] libsysdecode does not decode all capability rights

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263165

            Bug ID: 263165
           Summary: libsysdecode does not decode all capability rights
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: markj@FreeBSD.org

The "mktables" script used to extract rights from capsicum.h skips over
"composite" rights like CAP_SEEK.  As a result, kdump can give bizarre-looking
messages when an ENOTCAPABLE error occurs:

MainThread CAP   operation requires CAP_READ,CAP_SEEK_TELL,CAP_MMAP, descriptor
holds CAP_READ,CAP_SEEK_TELL,CAP_MMAP,CAP_FSTAT

In this example, the operation really requires CAP_READ, CAP_SEEK and CAP_MMAP.

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