[IMP] config: clarify help about memory limits

When you deploy Odoo for the first time, it is not explicit that you
must enter a value in bytes for these specific parameters.

closes odoo/odoo#39831

Signed-off-by: Richard Mathot (rim) <rim@openerp.com>

odoo/tools/config.py

@@ -303,11 +303,11 @@ class configmanager(object):
                              help="Specify the number of workers, 0 disable prefork mode.",
                              type="int")
             group.add_option("--limit-memory-soft", dest="limit_memory_soft", my_default=2048 * 1024 * 1024,
-                             help="Maximum allowed virtual memory per worker, when reached the worker be "
+                             help="Maximum allowed virtual memory per worker (in bytes), when reached the worker be "
                              "reset after the current request (default 2048MiB).",
                              type="int")
             group.add_option("--limit-memory-hard", dest="limit_memory_hard", my_default=2560 * 1024 * 1024,
-                             help="Maximum allowed virtual memory per worker, when reached, any memory "
+                             help="Maximum allowed virtual memory per worker (in bytes), when reached, any memory "
                              "allocation will fail (default 2560MiB).",
                              type="int")
             group.add_option("--limit-time-cpu", dest="limit_time_cpu", my_default=60,