Yes, I should have done this five years ago...

Move vparam.h to mgt/mgt_param.h

it will be used from.

which just hangs if we don't have it

Reduce scope of heritage.h
Reduce scope of libvcl.h

Fixes #1042

Conflicts:

	bin/varnishd/mgt/mgt_param.c

it belongs there.

params much clearer.  Manager should never read the childs copy.

of maintaining magic hex-bit values that must match.

Use a mark&mark strategy to test all obj.* bans even if there are
req.* bans in the way.

Set the default total transfer time to 600s.

Retry if we hit a TCP timeout if some data was sent and only error out
when we get an error or no data was sent in the time period.