Rename workspaces in startup sequences.

When renaming workspaces, any workspace names in pending startup
sequences also need to be renamed.

src/startup.c

@@ -257,6 +257,22 @@ void startup_monitor_event(SnMonitorEvent *event, void *userdata) {
     }
 }
 
+/**
+ * Renames workspaces that are mentioned in the startup sequences.
+ *
+ */
+void startup_sequence_rename_workspace(char *old_name, char *new_name) {
+    struct Startup_Sequence *current;
+    TAILQ_FOREACH(current, &startup_sequences, sequences) {
+        if (strcmp(current->workspace, old_name) != 0)
+            continue;
+        DLOG("Renaming workspace \"%s\" to \"%s\" in startup sequence %s.\n",
+             old_name, new_name, current->id);
+        free(current->workspace);
+        current->workspace = sstrdup(new_name);
+    }
+}
+
 /**
  * Gets the stored startup sequence for the _NET_STARTUP_ID of a given window.
  *