add test and documentation for "draft" capability

Problem: cannot check if libzmq was build with draft api

As discussed in #2307

cmake: Set output name to libzmq for the libzmq-static target

Solution: Change the target output name from libzmq-static to libzmq.

Updated buildbase and buildall to work with visual studio 2017

cmake install on linux fixed

Problem: Thread-safe solution for modify hwm of pipe

Solution: where change pipe hwm, send a command (new type pipe_hwm) to peer, so peer pipe can modify hwm thread-safely

Problems: modifying pipe from different thread is not safe and HWM always boosted by 1

Solution: initialise *hwmboost to -1 instead of 1, and use it only if
it's >= 0. The socket option code checks anyway that the
user-provided value is >= 0 so there is no risk of clashing. The
documentation also specifies that it has to be >= 0.

Solution: revert change from #2299 to avoid bugs while we look for an
alternative and thread-safe solution

Problem: set hwm after connect lead to infinite hwm

Problem: spec file still depends on libuuid

Solution: remove the dependency as it's not been needed for a while

Problem: debian packages do not build manpages

Solution: build-depend on asciidoc and xmlto

Cmake win install

Windows cmake build fixed

Problem: peer can close connection before SO_NOSIGPIPE is set

Solution: setsockopt returns EINVAL if the connection was closed by
the peer after the accept returned a valid socket. This is a valid
network error and should not cause an assert.
To handle this we have to extract the setsockopt from the stream
engine, as there's no clean way to return an error from the
constructor. Instead, try to set this option before creating the
engine in the callers, and return immediately as if the accept
had failed to avoid churn. Do the same for the connect calls by
setting the option in open_socket, so that the option for that
case is set even before connecting, so there's no possible race
condition.
Since this has to be done in 4 places (tcp/ipc listener, socks
connecter and open_socket) add an utility function in ip.cpp.
Fixes #1442

Problem: zmq_proxy* may return EINTR other than ETERM

Problem:capitalized include filenames trip mingw

Solution: mention this in the documentation

Solution: use lowercase

fix typos

Fixed issue #2227 second part

tests/README.md explicitly indicates to check the libzmq.lib path in
CMakeLists.txt.

The mechanism is instanciated during the handshake itself, when and
error happen before this, the error method shall work anyway.
An error handling with a NULL mechanism means the handshake fail, so the
handshake failure event is also raised in this case.

 - removed the previously added encryption_error, less changes less bug
 - handshake fail is now signaled when an error happen while the
   mechanism is still hanshaking

Problem: build fails on GNU/Hurd as it does not support IPV6_TCLASS