Merge "force_focus_wrapping" option into "focus_wrapping force"

Allow enabling forced focus wrapping by specifying "focus_wrapping
force" in i3's configuration. This syntax supersedes the previous
"force_focus_wrapping yes" one, which remains available for backwards
compatibility.

include/data.h

@@ -133,6 +133,15 @@ typedef enum {
     POINTER_WARPING_NONE = 1
 } warping_t;
 
+/**
+ * Focus wrapping modes.
+ */
+typedef enum {
+    FOCUS_WRAPPING_OFF = 0,
+    FOCUS_WRAPPING_ON = 1,
+    FOCUS_WRAPPING_FORCE = 2
+} focus_wrapping_t;
+
 /**
  * Stores a rectangle, for example the size of a window, the child window etc.
  * It needs to be packed so that the compiler will not add any padding bytes.