more fixes to frappy command

- frappy(main=<maincfg>) must (re)load only <maincfg>
- frappy(<maincfg>) does re(load) standard stick, if available

commands.py

@@ -146,23 +146,37 @@ def set_se_list():
 
 @usercommand
 @helparglist('main [, stick [, addons]]')
-def frappy(main=None, stick=None, addons=None):
+def frappy(*args, main=None, stick=None, addons=None):
     """(re)start frappy server(s) with given configs and load setup if needed
 
     - without argument: list running frappy servers
     - frappy('<cfg>'): if available, the standard stick is added too
     - frappy(''): the stick is removed too
-    - addons are not changed when not given!
+    - addons are not changed when not given
+    - frappy(main='<cfg>')  # main cfg is changed, but stick is kept
     """
-    if main is not None:
-        if stick is None:
-            if main:
-                stickcfg = main + 'stick'
-                if stickcfg in FrappyNode.available_cfg('stick'):
-                    # if a default stick is available, start this also
-                    stick = stickcfg
-            else:
-                stick = ''
+    if args:
+        if main is not None:
+            raise TypeError('got multiple values for main')
+        main = args[0]
+        if len(args) == 1:  # special case: main given as single argument
+            if stick is None:  # auto stick
+                if main == '':
+                    stick = ''  # remove stick with main
+                else:
+                    stickcfg = main + 'stick'
+                    if stickcfg in FrappyNode.available_cfg('stick'):
+                        # if a default stick is available, start this also
+                        stick = stickcfg
+        else:
+            if stick is not None:
+                raise TypeError('got multiple values for stick')
+            stick, *alist = args
+            if alist:
+                if addons is not None:
+                    raise TypeError('got multiple values for addons')
+                addons = ','.join(alist)
+    session.log.info('frappy_start %r %r %r', main, stick, addons)
     all_cfg = frappy_start(main=main, stick=stick, addons=addons)
     session.log.info(all_info(all_cfg))
 
@@ -217,6 +231,7 @@ def frappy_list(service=None):
         printTable(['command'], [['frappy_list(%r)' % s] for s in SERVICES], session.log.info)
         session.log.info(' ')
     for cfgdir in bases:
+        table.append('--- %s' % cfgdir)
         for cfgfile in glob(join(cfgdir, '*.cfg')):
             parser = ConfigParser()
             parser.read(cfgfile)