rework to allow creating multiple clients that connecting to different
jack servers in one process

done by creating a client context which holds server id, this context
is then evaluated against global variables that were extended to hold
multiple synchronization instances for each client

Change-Id: I3a6b4a44fe9d820ba6b6bbbeb06b158d9ad43fce
Signed-off-by: Adam Miartus <external.adam.miartus@de.bosch.com>

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4493 0c269be4-1314-0410-8aa9-9f06e86f4224

The main goal is to reduce risk of mismatch between allocated
and initialized parameter numbers.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/branches/libjacknet@3368 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3356 0c269be4-1314-0410-8aa9-9f06e86f4224

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3306 0c269be4-1314-0410-8aa9-9f06e86f4224