Removed the comma-separated delimiting of this option parsing, as that
conflicted with comma characters often used in backend names. Use
multiple arguments to have several filters.

Parser honors backslash escapes. This makes it possible to list names
containing '.' (also common with backend names).

Fixes: #957

With proper flushing happening on idle, this option is obsolete.

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.