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.

shutdown.

asuming that would for ever be the case.  This fails on IPv6 only
systems and FreeBSD jails where localhost is the "real" IP number.

cases dealing with oc's without a boc duing fill-up.

All objcores, also for synth and req.body are now born with a boc,
which must of course be properly disposed of.

More assertive LRU code.