Merge pull request #1774 from timgates42/bugfix_typo_optional

docs: fix simple typo, optionnal -> optional

glances/static_list.py

@@ -54,7 +54,7 @@ class GlancesStaticServer(object):
                 for s in ['name', 'port', 'alias']:
                     new_server[s] = config.get_value(self._section, '%s%s' % (postfix, s))
                 if new_server['name'] is not None:
-                    # Manage optionnal information
+                    # Manage optional information
                     if new_server['port'] is None:
                         new_server['port'] = '61209'
                     new_server['username'] = 'glances'