支持非比赛submission的重判

submission/urls/admin.py

@@ -0,0 +1,7 @@
+from django.conf.urls import url
+
+from ..views.admin import SubmissionRejudgeAPI
+
+urlpatterns = [
+    url(r"^submission/rejudge?$", SubmissionRejudgeAPI.as_view(), name="submission_rejudge_api"),
+]