added spa-pkts fuzzing cycle

test/afl/results/2.6.7/136d017/spa-pkts

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+
+          american fuzzy lop 1.77b (fwknopd,SPA,encode/decode,136d017)
+
+┌─ process timing ─────────────────────────────────────┬─ overall results ─────┐
+│        run time : 0 days, 20 hrs, 23 min, 20 sec     │  cycles done : 32     │
+│   last new path : 0 days, 0 hrs, 26 min, 35 sec      │  total paths : 448    │
+│ last uniq crash : none seen yet                      │ uniq crashes : 0      │
+│  last uniq hang : none seen yet                      │   uniq hangs : 0      │
+├─ cycle progress ────────────────────┬─ map coverage ─┴───────────────────────┤
+│  now processing : 294 (65.62%)      │    map density : 1765 (2.69%)          │
+│ paths timed out : 0 (0.00%)         │ count coverage : 1.58 bits/tuple       │
+├─ stage progress ────────────────────┼─ findings in depth ────────────────────┤
+│  now trying : splice 14             │ favored paths : 141 (31.47%)           │
+│ stage execs : 770/1000 (77.00%)     │  new edges on : 181 (40.40%)           │
+│ total execs : 102M                  │ total crashes : 0 (0 unique)           │
+│  exec speed : 1393/sec              │   total hangs : 0 (0 unique)           │
+├─ fuzzing strategy yields ───────────┴───────────────┬─ path geometry ────────┤
+│   bit flips : 87/411k, 8/411k, 8/410k               │    levels : 13         │
+│  byte flips : 1/51.5k, 0/51.0k, 0/50.1k             │   pending : 0          │
+│ arithmetics : 53/2.87M, 0/12.2k, 0/2406             │  pend fav : 0          │
+│  known ints : 7/292k, 2/1.43M, 1/2.21M              │ own finds : 443        │
+│  dictionary : 0/0, 0/0, 42/2.41M                    │  imported : n/a        │
+│       havoc : 216/40.3M, 5/51.6M                    │  variable : 448        │
+│        trim : 2.48%/20.4k, 0.00%                    ├────────────────────────┘
+└─────────────────────────────────────────────────────┘             [cpu:105%]
+

test/afl/results/2.6.7/136d017/spa-pkts-plot/index.html

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+<table style="font-family: 'Trebuchet MS', 'Tahoma', 'Arial', 'Helvetica'">
+<tr><td style="width: 18ex"><b>Banner:</b></td><td>fwknopd,SPA,encode/decode,136d017</td></tr>
+<tr><td><b>Directory:</b></td><td>.</td></tr>
+<tr><td><b>Generated on:</b></td><td>Wed May 20 16:55:20 PDT 2015</td></tr>
+</table>
+<p>
+<img src="high_freq.png" width=1000 height=300><p>
+<img src="low_freq.png" width=1000 height=200><p>
+<img src="exec_speed.png" width=1000 height=200>
+