add switch_hashtable_insert_destructor so you can insert a pointer into a hash with a custom destructor and use it in spandsp to fix a leak on reloadxml with the tone_descriptor tables and fix a bunch of random tiny leaks etc

src/include/private/switch_hashtable_private.h

@@ -22,6 +22,7 @@ struct entry
     void *k, *v;
     unsigned int h;
 	hashtable_flag_t flags;
+	hashtable_destructor_t destructor;
     struct entry *next;
 };
 

src/include/switch_core.h

@@ -1370,7 +1370,9 @@ SWITCH_DECLARE(switch_status_t) switch_core_hash_destroy(_Inout_ switch_hash_t *
   \return SWITCH_STATUS_SUCCESS if the data is added
   \note the string key must be a constant or a dynamic string
 */
-SWITCH_DECLARE(switch_status_t) switch_core_hash_insert(_In_ switch_hash_t *hash, _In_z_ const char *key, _In_opt_ const void *data);
+SWITCH_DECLARE(switch_status_t) switch_core_hash_insert_destructor(_In_ switch_hash_t *hash, _In_z_ const char *key, _In_opt_ const void *data, hashtable_destructor_t destructor);
+#define switch_core_hash_insert(_h, _k, _d) switch_core_hash_insert_destructor(_h, _k, _d, NULL)
+
 
 /*! 
   \brief Insert data into a hash

src/include/switch_hashtable.h

@@ -123,7 +123,8 @@ typedef enum {
 } hashtable_flag_t;
 
 SWITCH_DECLARE(int)
-switch_hashtable_insert(switch_hashtable_t *h, void *k, void *v, hashtable_flag_t flags);
+switch_hashtable_insert_destructor(switch_hashtable_t *h, void *k, void *v, hashtable_flag_t flags, hashtable_destructor_t destructor);
+#define switch_hashtable_insert(_h, _k, _v, _f) switch_hashtable_insert_destructor(_h, _k, _v, _f, NULL)
 
 #define DEFINE_HASHTABLE_INSERT(fnname, keytype, valuetype)		\
 	int fnname (switch_hashtable_t *h, keytype *k, valuetype *v)	\

src/include/switch_types.h

@@ -2079,6 +2079,8 @@ typedef struct switch_core_port_allocator switch_core_port_allocator_t;
 typedef struct switch_media_bug switch_media_bug_t;
 typedef struct switch_limit_interface switch_limit_interface_t;
 
+typedef void (*hashtable_destructor_t)(void *ptr);
+
 struct switch_console_callback_match_node {
 	char *val;
 	struct switch_console_callback_match_node *next;

src/include/switch_utils.h

@@ -875,7 +875,7 @@ SWITCH_DECLARE(switch_time_t) switch_str_time(const char *in);
   \param vname the name of the global pointer to modify with the new function
 */
 #define SWITCH_DECLARE_GLOBAL_STRING_FUNC(fname, vname) static void fname(const char *string) { if (!string) return;\
-		if (vname) {free(vname); vname = NULL;}vname = strdup(string);} static void fname(const char *string)
+		if (vname) {vname = NULL;}vname = switch_core_permanent_strdup(string);} static void fname(const char *string)
 
 /*!
   \brief Separate a string into an array based on a character delimiter