Add blurred or pixelated screenshot patch

- Lockscreen is blurred & pixelated version of current screen

config.h

@@ -10,3 +10,13 @@ static const char *colorname[NUMCOLS] = {
 
 /* treat a cleared input like a wrong password (color) */
 static const int failonclear = 1;
+
+/*Enable blur*/
+#define BLUR
+/*Set blur radius*/
+static const int blurRadius=15;
+
+/*Enable Pixelation*/
+#define PIXELATION
+/*Set pixelation radius*/
+static const int pixelSize=10;