Belated checkin of a lot of new pcapper features. Highlights:
Event system: When compiled with -DEVENTSYS, can be made to wait for time to start in an experiment before starting to count packets. Times are also reported relative to experiment time start. Use the '-e' flag to enable. SUID support: If compiled with -DDROPROOT, and it seems that pcapper was started setuid root (euid == 0, and ruid != 0), drops root permissions after opening BPF (or raw socket in Linux.) This allows it get permissions to read packets, but still be killed by the user. This is particularly useful with the testbed's program objects. New command-line options: -s: Print out packet counts to stdout, in addition to listening on a socket ('-f -' does the same thing, too) -p: Count only payload sizes, not header sizes -e: Wait for event system time to start in pid/eid -z: Don't count zero-length packets in the packet counts (useful with '-p') Also, now creates a GNUmakefile the _right_ way.
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