BUG/MINOR: ssl: rejects OCSP response without nextupdate.

To cache an OCSP Response without expiration time is not safe.
BUG/MEDIUM: ssl: Fix to not serve expired OCSP responses.

For some browsers (firefox), an expired OCSP Response causes unwanted behavior.

Haproxy stops serving OCSP response if nextupdate date minus
the supported time skew (#define OCSP_MAX_RESPONSE_TIME_SKEW) is
in the past.
BUG/MINOR: ssl: Fix OCSP resp update fails with the same certificate configured twice.
BUG/MAJOR: session: revert all the crappy client-side timeout changes

This is the 3rd regression caused by the changes below. The latest to
date was reported by Finn Arne Gangstad. If a server responds with no
content-length and the client's FIN is never received, either we leak
the client-side FD or we spin at 100% CPU if timeout client-fin is set.

Enough is enough. The amount of tricks needed to cover these side-effects
starts to look like used toilet paper stacked over a chocolate cake. I
don't want to eat that cake anymore!

All this to avoid reporting a server-side timeout when a client stops
uploading data and haproxy expires faster than the server... A lot of
"ifs" resulting in a technically valid log that doesn't always please
users, and whose alternative causes that many issues for all others
users.

So let's revert this crap merged since 1.5-dev25 :
  Revert "CLEANUP: http: don't clear CF_READ_NOEXP twice"
    This reverts commit 1592d1e72a4a2d25a554c299ae95a3e6cad80bf1.
  Revert "BUG/MEDIUM: http: clear CF_READ_NOEXP when preparing a new transaction"
    This reverts commit 77d29029af1c44216b190dd7442964b9d8f45257.
  Revert "BUG/MEDIUM: session: don't clear CF_READ_NOEXP if analysers are not called"
    This reverts commit 0943757a2144761c60e416b5ed07baa76934f5a4.
  Revert "BUG/MEDIUM: http: disable server-side expiration until client has sent the body"
    This reverts commit 3bed5e9337fd6eeab0f0006ebefcbe98ee5c4f9f.
  Revert "BUG/MEDIUM: http: correctly report request body timeouts"
    This reverts commit b9edf8fbecc9d1b5c82794735adcc367a80a4ae2.
  Revert "BUG/MEDIUM: http/session: disable client-side expiration only after body"
    This reverts commit b1982e27aaff2a92a389a9f1bc847e3bb8fdb4f2.

If a cleaner AND SAFER way to do something equivalent in 1.6-dev, we *might*
consider backporting it to 1.5, but given the vicious bugs that have surfaced
since, I doubt it will happen any time soon.

Fortunately, that crap never made it into 1.4 so no backport is needed.