[FIX] netsvc: logs to syslog

When starting the Odoo server with the parameters --syslog,
the logs are supposed to be pushed in the syslog.

This was no longer the case since e9d047e611.
Indeed, if no address is specified ('localhost', 514) is used,
which not always work. We therefore have no choice to define an address
which is '/var/run/log' for MacOSx,
and '/dev/log' for any other linux system.

opw-633074

openerp/netsvc.py

@@ -22,6 +22,7 @@
 import logging
 import logging.handlers
 import os
+import platform
 import pprint
 import release
 import sys
@@ -142,8 +143,10 @@ def init_logger():
         # SysLog Handler
         if os.name == 'nt':
             handler = logging.handlers.NTEventLogHandler("%s %s" % (release.description, release.version))
+        elif platform.system() == 'Darwin':
+            handler = logging.handlers.SysLogHandler('/var/run/log')
         else:
-            handler = logging.handlers.SysLogHandler()
+            handler = logging.handlers.SysLogHandler('/dev/log')
         format = '%s %s' % (release.description, release.version) \
                 + ':%(dbname)s:%(levelname)s:%(name)s:%(message)s'