tasks: an open task can be blocked directly (deferred before anyone starts it)

harbor/work.py

@@ -10,7 +10,7 @@ from .util import (PRIORITY_NAMES, HarborError, first_line, iso, parse_iso, pars
 TASK_STATES = ("open", "in_progress", "blocked", "review", "done", "cancelled")
 OPEN_TASK_STATES = ("open", "in_progress", "blocked", "review")
 TASK_MOVES = {
-    "open": {"in_progress", "cancelled"},
+    "open": {"in_progress", "cancelled", "blocked"},     # deferred before anyone starts it
     "in_progress": {"blocked", "open", "done", "cancelled", "review"},
     "blocked": {"in_progress", "open", "cancelled"},
     "review": {"in_progress", "done", "cancelled"},