[IMP] core: strip log_handler items before splitting them

Allows better formatted and commented log_handler items in
configuration files: configparser allows multiline values and
interspersed comments (stripping out comment lines), but while it
removes indent it leaves the linebreaks, so e.g.

    foo =
      bar,
      # qux
      quux

when parsed and split on "," results in `['\nbar', '\nquux']` which is
obviously an issue for logging (as it assumes the leading `\n` is part
of the logger name proper).

Since log_handler items can be fairly long and are not necessarily
self-descriptive as to *why* they were selected for re-configuration,
allowing one per line & comments is helpful.

odoo/netsvc.py

@@ -200,7 +200,7 @@ def init_logger():
 
     logging_configurations = DEFAULT_LOG_CONFIGURATION + pseudo_config + logconfig
     for logconfig_item in logging_configurations:
-        loggername, level = logconfig_item.split(':')
+        loggername, level = logconfig_item.strip().split(':')
         level = getattr(logging, level, logging.INFO)
         logger = logging.getLogger(loggername)
         logger.setLevel(level)