add snd_device_name_hint() function and initial implementation

- add snd_device_name_hint() and snd_device_name_free_hint() functions
- add snd_ctl_iface_conf_name() functions
- do not accept parameters for the plugin definition without @args section
- add defaults.pcm.dmix.card/device and dsnoop.card/device definitions
- add hints for HDA-Intel.conf, pcm/dmix.conf, pcm/dsnoop.conf and alsa.conf
- add test/namehint test utility
- doxygen related cleanups

include/control.h

@@ -214,6 +214,9 @@ int snd_card_get_index(const char *name);
 int snd_card_get_name(int card, char **name);
 int snd_card_get_longname(int card, char **name);
 
+int snd_device_name_hint(int card, snd_ctl_elem_iface_t iface, char ***hints);
+int snd_device_name_free_hint(char **hints);
+
 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
 int snd_ctl_close(snd_ctl_t *ctl);
@@ -256,6 +259,7 @@ snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
 
 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
+const char *snd_ctl_iface_conf_name(snd_ctl_elem_iface_t iface);
 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
 
 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);

include/local.h

@@ -259,4 +259,8 @@ void snd_config_set_hop(snd_config_t *conf, int hop);
 int snd_config_check_hop(snd_config_t *conf);
 #define SND_CONF_MAX_HOPS	64
 
+int snd_config_search_alias_hooks(snd_config_t *config,
+                                  const char *base, const char *key,
+				  snd_config_t **result);
+
 #endif