Always use an oc+TRANSIENT for buffering, just don't commit the
storage if not caching.

tour through vcl_recv{}

Fixes: #1857

Pack oc 8 bytes tighter.

mechanisms into a single general ObjSubscribeEvents() mechanism.

For efficiency, only the events subscribed to will be delivered.

call into the stevedores methods.

Add macros to work on "disolved" struct exp

part of the stevedore API.

on osx.

Use the cli_timeout to control how long the MGR waits before killing
the worker process, and give this test 60 seconds.