Add almost full option support

cmd/micro/util/util.go

@@ -6,6 +6,7 @@ import (
 	"os/user"
 	"path/filepath"
 	"regexp"
+	"strconv"
 	"strings"
 	"time"
 	"unicode/utf8"
@@ -309,6 +310,19 @@ func GetCharPosInLine(b []byte, visualPos int, tabsize int) int {
 	return i
 }
 
+// ParseBool is almost exactly like strconv.ParseBool, except it also accepts 'on' and 'off'
+// as 'true' and 'false' respectively
+func ParseBool(str string) (bool, error) {
+	if str == "on" {
+		return true, nil
+	}
+	if str == "off" {
+		return false, nil
+	}
+	return strconv.ParseBool(str)
+}
+
+// Clamp clamps a value between min and max
 func Clamp(val, min, max int) int {
 	if val < min {
 		val = min