the exact same byte sequence from the backend, Gzip, Gunzip or ESI
expansion.

(See also: #940)

Inspired by:  An old patch from Mithrandir I found in my mailbox

parts of config.h we don't need anymore

Detectived by:	scn

Fixes:	#1359

-Wall -Werror is always on, at least until all of Jenkins turns red.

All developer warnings have been collected under --enable-developer-warnings
and several auxillary developer options have been absorbed or
otherwise eliminated.

patently obvious that we want the to stick around, even if unused.

long long) agnostic.

into nitpicking mode, so the test-cases reveal if the VCC outputs
anything bogus or suspect.