doc: update example.conf.

Reorder settings by category, add `poolname` and `state` to pool settings.

example.conf

@@ -1,54 +1,72 @@
 {
 "pools" : [
 	{
+		"poolname" : "Preferred Pool",
 		"url" : "http://url1:8332",
 		"user" : "user1",
 		"pass" : "pass1"
 	},
 	{
+		"poolname" : "Failover Pool",
 		"url" : "http://url2:8344",
 		"user" : "user2",
-		"pass" : "pass2"
+		"pass" : "pass2",
+		"state" : "enabled"
 	},
 	{
-		"url" : "http://url3:8332",
+		"poolname" : "Failover Pool",
+		"url" : "http://url3:8344",
 		"user" : "user3",
-		"pass" : "pass3"
+		"pass" : "pass3",
+		"state" : "disabled"
+	},
+	{
+		"poolname" : "Testing Pool",
+		"url" : "http://url4:8332",
+		"user" : "user4",
+		"pass" : "pass4",
+		"state" : "hidden"
 	}
 ],
+
+"failover-only" : true,
+"failover-switch-delay" : "60",
+"no-pool-disable" : true,
+
+"kernel-path" : "/usr/local/bin",
+"kernel" : "alexkarold,ckolivas,zuikkis",
+
 "intensity" : "d,9,9,9",
 "xintensity" : "0,0,0",
 "rawintensity" : "0,0,0",
-"kernel" : "ckolivas,ckolivas,ckolivas",
 "lookup-gap" : "2,2,2",
+
 "thread-concurrency" : "15508,15508,15508",
 "shaders" : "0,0,0",
 
+"gpu-threads" : "2",
 "gpu-engine" : "0-985,0-950,0-960,0-1000",
-"gpu-fan" : "0-85,0-85,0-85,0-85",
 "gpu-memclock" : "860,825,835,875",
 "gpu-powertune" : "20,20,20,20",
+
 "gpu-vddc" : "0.000,0.000,0.000",
+"gpu-fan" : "0-85,0-85,0-85,0-85",
+
+"auto-gpu" : true,
+"auto-fan" : true,
 
-"temp-cutoff" : "95,95,95,95",
-"temp-overheat" : "85,85,85,85",
 "temp-target" : "75,75,75,75",
+"temp-overheat" : "85,85,85,85",
+"temp-cutoff" : "95,95,95,95",
+"temp-hysteresis" : "3",
 
 "api-listen" : false,
 "api-mcast-port" : "4028",
 "api-port" : "4028",
 
-"auto-fan" : true,
-"auto-gpu" : true,
-"expiry" : "120",
-"failover-only" : true,
-"gpu-threads" : "2",
-"log" : "5",
 "queue" : "1",
-"scan-time" : "60",
-"temp-hysteresis" : "3",
+"scan-time" : "7",
+"expiry" : "28",
 
-"failover-switch-delay" : "60",
-"no-pool-disable" : true,
-"kernel-path" : "/usr/local/bin"
+"log" : "5"
 }