Fixes negative values in xrun reports on Linux kernels 4.0 and above.

Update OS X CoreAudio AudioUnits API usage.

Moves VALGRIND_MEMSET above USE_CAPABILITIES ifdef

OpenBSD compilable :

allow to use source date for man page generation

Add support for travis

Check for clock_nanosleep before use

Sets memory for valgrind even if USE_CAPABILITIES is not defined.

Fixes a homebrew issue (https://github.com/Homebrew/legacy-homebrew/issues/43874)

Fixed leaked memory with jack_tmpdir.

Uses static local variable like how jack_user_dir does. jack_get_tmpdir()
replaces jack_tmpdir for the most part except in jackd -l where it would
cause an infinite loop, and instead DEFAULT_TMP_DIR is used, which is
what it would happen anyway. Also in jack_user_dir the default value is
used if jack_user_dir returns NULL from some error, but an error message
is printed with jack_error(), this is the same as the old behavior, but
I am not sure this is quite what should happen. Still, the exact same
behavior as before is acheived except without the use of the jack_tmpdir
global and the memory issues caused by calling jack_get_tmpdir().

Fixes a build failure on macOS 10.12 Sierra

- md5sum is not available.
- adding sndio support from Jacob Meuser <jakemsr@sdf.lonestar.org>.
- various patches from ajacoutot@, jasper@ and sthen@

this enables making reproducible builds of this package

This reverts commit 423931219d.

This reverts commit cf32a3475e.

These files are python "binaries", and the source is already in git.

Minor fixes

Alsa fixes

This variable is needed for doxygen.

Autotool fixes

* Fix usage of `AC_INIT`.
* Extract JACK version numbers from `AC_INIT` version number.
* Newer versions of automake insists on the `subdir-objects` option
  when using C files from outside the current directory.
* Need to use generate `noinst_LTLIBRARIES` rather than just adding
  and out-of-dir C file to the `*_SOURCES`.

The "client" argument being passed to jack_set_property() is
jack_client_internal_t*, not jack_client_t* as expected, which leads
to a crash. Using client->private_client (which is a jack_client_t*)
causes deadlock because do_request() is called recursively.

The goal here is good, but it can't be accomplished in this way.

This reverts commit 439e47da1a.