+#
+# timelines
+# lei-daemon | LeiAuth worker #0 | other WQ workers
+# ----------------------------------------------------------
+# spawns all workers ---->[ workers all start and run ipc_atfork_child ]
+# | do_auth_atfork | wq_worker_loop sleep
+# | # reads .netrc |
+# | # queries git-credential|
+# | send net_merge_continue |
+# | | |
+# | v |
+# recv net_merge_continue <---------/ |
+# | | |
+# v | |
+# broadcast net_merge_all [ all workers (including LeiAuth worker #0) ]
+# [ LeiAuth worker #0 becomes just another WQ worker ]
+# |
+# call net_merge_all_done ->-> do per-WQ-class defined actions