stevedore selection algorithm exactly.

Spotted by:	FlexeLint

Rather than copying one char at the time extend the buffer as needed and
use memcpy.

This saves a ugly ifdef for mgt code in storage.h

stevedores and call it "SML".

I bet this is going to surprise Martin :-)

These are the methods used by "simple" stevedores, more advanced
stevedores can bring their own set.

that needs to know about oc->busyobj semantics

NetBSD's pthread_setname_np(3) wants a void *. Sigh.

This is enough to get the warnings fixed in the previous commit on Linux.

VCC's own complaint instead.

The latter takes precedence as per RFC 7232.  Also if we have an I-N-M
but no entity don't check I-M-S, just do a non-conditional request.

That is, if both If-None-Match and Range are present we need to use a
strong comparison as the representation needs to be byte-for-byte
identical.

As per RFC 7232.

Fixes #1816.

Send your kudos to POSIX for failing to provide a standard here.

with a single one.

It's needed for the vdi_healthy_f invocation.

This is for the 4.1 ABI, since the next major release will have a
VRT_MAJOR_VERSION bump instead. The two functions may also change
semantics before the next 4.1.x, but will still be _new_ as far as
releases are concerned.