PC-BSD/trueos 14aef6dusr.bin/truss syscalls.c syscall.h

truss: decode sysctl names.

Submitted by:   Pawel Biernacki
MFC after:      1 week
Differential revision:  https://reviews.freebsd.org/D21688
DeltaFile
+72-0usr.bin/truss/syscalls.c
+1-0usr.bin/truss/syscall.h
+73-02 files

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