Otherwise ban_equal may not work due to undefined contents of buf

Should fix c19.vtc regression from 984f145f

There are two timeout names where `timeout` is the prefix:

- timeout_linger
- timeout_idle

If it were up to me, they'd be called the other way around and according
to the documentation:

> `session_linger` has been renamed to `timeout_linger

If it were up to me, it would have been renamed to a self-describing
`session_linger_timeout` (wink wink, nudge nudge).

Typo spotted by scn.

should fix #2050

Thanks, Dridi

Addresses question in #2038

Closes #2047

Addresses question in #2038

This should get CFLAGS right for Solaris Studio

relevant for #2047

The P macro is only ever called with one argument and Solaris cc
rightly emits E_ARGUEMENT_MISMATCH (yes, with the typo)

and add a -Werror replacement for Solaris Studio.

This only makes Solaris Studio work with the default options, not for
--enable-developer-warnings

Partly addresses #2047

rather than the values from pkg-config only. CLAGS and LIBS
may contain important generic compiler / linker flags for this
platform.

test "x$ac_cv_prog_cc_c99" = "x" breaks autoconf for compilers which do not need
any extra arguments to support c99.

Partly addresses #2047

fix #2027

For match_tag == SLT_Timestamp, we'd miss a match otherwise.
Add the missing /* FALLTHROUGH */

This reverts commit 97bfb002.

If a log transaction is parsed that don't contain timestamps
(e.g. they are filtered in varnishd), then this would cause a NULL
pointer dereference.

Fix an issue where the new timestamp was set without locking.

Spotted by: Coverity

Spotted by: Coverity

It was counter-intuitive that, for pass objects, we logged the
parsed TTL when in fact the ttl visible from vcl was always 0.
In the builtin.vcl the Hit-For-Pass check was also called
for objects already classified as uncacheable.

Now, for passes, we

- do not parse Cache-Control / Expires
  - and, consequently, do not log TTL RFC
- do not call the hfp-code in builtin.vcl
  - and, consequently, do not log TTL VCL

Reflect this in b2.vtc