Backport r1564727: Fix support for uploading files by using pushlstring instead of pushstring when pushing binary data.

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In 2.4, the MPM leaves a copy of the non-disconnected FD sitting in
context->accept_socket. This FD will be closed a second time, often
shortly after a worker picks it up in this same FD being reused.  The
first recv fails with WSAENOTSOCK since the same FD was closed in the
listener thread while the worker was pulling it off the queue

(The second close is of the underlying FD/socket, not a shared
apr_socket_t, so it's not short-circuited)

This patch makes it a bit more 2.2.x-ish and solves my problem -- the
context->accept_socket gets zapped at the bottom of the loop if
!disconnected.


Submitted by: covener
Reviewed/backported by: jim


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as they have been obsoleted through "SSLOpenSSLConfCmd ServerInfoFile"
meanwhile (r1555683, and CT is no longer using SSL_CTX_use_authz_file either).


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add auto-ECDHE curve selection backport proposal


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- also add mod_filter_old.png (converted from .gif), required for inclusion in
  latex


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