Fix utils.AdjustGoMaxProcs

Since Go 1.5, Go will use the total number of logical processers that the
system has available. Caveats to this are if someone has set the
GOMAXPROCS env var set or wish to limit usage of the number of logical processers
between a range from 1 to NumCPUs

engine/engine.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"flag"
 	"fmt"
+	"runtime"
 	"sync"
 	"time"
 
@@ -293,6 +294,9 @@ func (e *Engine) Start() error {
 	e.Uptime = time.Now()
 	log.Debugf(log.Global, "Bot '%s' started.\n", e.Config.Name)
 	log.Debugf(log.Global, "Using data dir: %s\n", e.Settings.DataDir)
+	log.Debugf(log.Global,
+		"Using %d out of %d logical processors for runtime performance\n",
+		runtime.GOMAXPROCS(-1), runtime.NumCPU())
 
 	enabledExchanges := e.Config.CountEnabledExchanges()
 	if e.Settings.EnableAllExchanges {