i3 - improved tiling WM

Make all workspaces starting with "__" internal

Patch status: needinfo

Patch by Alexander Berntsen

Long description:

Workspaces won't work properly if they start with "__", so reserve that
namespace altogether.

To apply this patch, use:
curl http://cr.i3wm.org/patch/516/raw.patch | git am

b/src/commands.c

15 
@@ -483,7 +483,7 @@ void cmd_move_con_to_workspace_back_and_forth(I3_CMD) {
16 
  *
17 
  */
18 
 void cmd_move_con_to_workspace_name(I3_CMD, char *name) {
19 
-    if (strncasecmp(name, "__i3_", strlen("__i3_")) == 0) {
20 
+    if (strncasecmp(name, "__", strlen("__")) == 0) {
21 
         LOG("You cannot switch to the i3 internal workspaces.\n");
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         ysuccess(false);
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         return;
24 
@@ -998,7 +998,7 @@ void cmd_workspace_back_and_forth(I3_CMD) {
25 
  *
26 
  */
27 
 void cmd_workspace_name(I3_CMD, char *name) {
28 
-    if (strncasecmp(name, "__i3_", strlen("__i3_")) == 0) {
29 
+    if (strncasecmp(name, "__", strlen("__")) == 0) {
30 
         LOG("You cannot switch to the i3 internal workspaces.\n");
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         ysuccess(false);
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         return;