Fix build errors in OpenSSL 1.1.0 and several other improvements . Done for IETF 102 hackathon.

Enable use of TLS 1.3. Done during IETF 101 hackathon.

fix typo and make it compile with SSL 1.1.0

Add idleconn manpage

Reroll No-SSLv3 patch/Add No-SSLv2 patch

Fix building when OpenSSL was compiled -nossl2  or -noss3

Restore the original --server and --server_name options

Prior to this commit --server took a list of servers, so making it
plural makes sense.

My OCD couldn't handle the multiple styles in this file.

This also fixes building with LibreSSL 2.2 (no SSLv2) and 2.3 (no SSLv3)

Patch to enable compilation with m4

Increased char size.

apply https://github.com/httperf/httperf/issues/8 patch from rowan.li…

Fix errno compilation error (found on Ubuntu 14.04)

Add very numerous bug fixes and features, from Norse Corp.

* Fix some corner cases with greedy mode, where ports would be
  tracked inside httperf rather than the OS.  There were handfuls
  of corner cases where it'd either loop over an already-allocated
  port by the OS and chew 100% of cpu with no progress. Also, hit an
  already allocated port by the OS, skip/stop, but then the next lookup
  would hit that port again - it would never find a new port to open.

* Add kqueue support for FreeBSD. (No, not using libevent. Yet.)

* Add a periodic stats option, to print out 200/302 counts once
  every second.  This is to aid in automatic scripts looking to graph
  the progress being made.

* Add the ability to define multiple local client addresses, so
  requests can come from a much bigger pool of IP addresses.
  This allows for much more concurrency per process.)

* Add an explicit timeout on how long httperf can run - again, to aid
  in automated testing.

* Add an option to allow header contents to be loaded in from a file.

* Other fixes, mostly type related fixes, thanks to clang/llvm on
  FreeBSD-10.

We're using this in production at Norse to stress test out things,
upwards of 25,000 requests per second per httperf process.

This is a hold-over from using select() back in the past.
It now uses libevent, so it no longer (itself) cares about the size of
FD_SETSIZE.