CE change environment variables syntax, sdutil Add help command

ce/interp.c

@@ -424,20 +424,24 @@ static void execute_cmd (struct ast_cmd* cmd, struct context* context) {
 
     int pgid = get_procgroup (pid);
 
-    for (int i = 0; i < cmd->arg_count; i++) {
+    int i = 0;
+    while (i < cmd->arg_count) {
       char* arg = cmd->args[i];
       char *key, *value;
 
-      char* sep = strchr (arg, '=');
+      if (arg[0] == '-') {
+        key = &arg[1];
 
-      if (sep != NULL) {
-        *sep = '\0';
-
-        key = arg;
-        value = sep + 1;
+        if (i < cmd->arg_count - 1) {
+          value = cmd->args[++i];
+        } else {
+          value = "yes";
+        }
 
         env_set (pgid, key, value, strlen (value) + 1);
       }
+
+      i++;
     }
 
     struct cmd_write_proc_ctx wpctx = {.pgid = pgid, .cancel_pid = pid};