FS-7496 Updated mime.types, added switch_core_mime_type2ext function and used it in mod_httapi. Now, file extensions defined in mime.types will be applied if mod_httapi downloads a file without one.

src/include/private/switch_core_pvt.h

@@ -222,6 +222,7 @@ struct switch_runtime {
 	int64_t offset;
 	switch_event_t *global_vars;
 	switch_hash_t *mime_types;
+	switch_hash_t *mime_type_exts;
 	switch_hash_t *ptimes;
 	switch_memory_pool_t *memory_pool;
 	const switch_state_handler_table_t *state_handlers[SWITCH_MAX_STATE_HANDLERS];