* move port UUID initialization into engine so that it is actually shared across clients
* export jack_server_dir() within libjack

Patch by colinf via

   http://trac.jackaudio.org/attachment/ticket/227/typos.patch

We recommend using symbolic names like hw:Live but when subdevices are u...

regcomp() was failing to parse them. This changeset improves the algorithm
by using less assumptions.

This commit is a backport of similar (but bigger) commit in jack2.
b3394f4dce

Avoids code duplication

Instead of introducing a prototype declaration, let's move the function so it
can be used by ffado_driver_attach().

Patch by Jonathan Woithe.

ffado_streaming_set_period_size() is exposed starting r2078 of FFADO.
To avoid a build dependency on ffado-svn in jack, we copy the prototype
declaration.
    
Since the symbol is defined as weak, no problems arise at runtime.