misc: set `algorithm` in example.conf, set GPU clocks as if there were 3 GPUs.

The example configuration is bogus anyway, but at least make it less bogus.

example.conf

@@ -36,6 +36,8 @@
 "kernel-path" : "/usr/local/bin",
 "kernel" : "alexkarold,ckolivas,zuikkis",
 
+"algorithm" : "scrypt",
+
 "intensity" : "d,9,9,9",
 "xintensity" : "0,0,0",
 "rawintensity" : "0,0,0",
@@ -45,9 +47,9 @@
 "shaders" : "0,0,0",
 
 "gpu-threads" : "2",
-"gpu-engine" : "0-985,0-950,0-960,0-1000",
+"gpu-engine" : "0-985,0-950,0-1000",
-"gpu-memclock" : "860,825,835,875",
+"gpu-memclock" : "860,825,875",
-"gpu-powertune" : "20,20,20,20",
+"gpu-powertune" : "20,20,20",
 
 "gpu-vddc" : "0.000,0.000,0.000",
 "gpu-fan" : "0-85,0-85,0-85,0-85",