relay: Make a transport_config function private

Part of 32213.

src/feature/relay/transport_config.c

@@ -11,6 +11,7 @@
  **/
 
 #include "orconfig.h"
+#define RELAY_TRANSPORT_CONFIG_PRIVATE
 #include "feature/relay/transport_config.h"
 
 #include "lib/encoding/confline.h"
@@ -111,7 +112,7 @@ get_transport_bindaddr_from_config(const char *transport)
  *
  *  The returned smartlist and its strings are allocated on the heap
  *  and it's the responsibility of the caller to free it. */
-smartlist_t *
+STATIC smartlist_t *
 get_options_from_transport_options_line(const char *line,const char *transport)
 {
   smartlist_t *items = smartlist_new();

src/feature/relay/transport_config.h

@@ -12,12 +12,12 @@
 #ifndef TOR_FEATURE_RELAY_TRANSPORT_CONFIG_H
 #define TOR_FEATURE_RELAY_TRANSPORT_CONFIG_H
 
+#include "lib/testsupport/testsupport.h"
+
 typedef struct or_options_t or_options_t;
 typedef struct smartlist_t smartlist_t;
 
 char *get_transport_bindaddr_from_config(const char *transport);
-smartlist_t *get_options_from_transport_options_line(const char *line,
-                                                     const char *transport);
 smartlist_t *get_options_for_server_transport(const char *transport);
 
 int options_validate_server_transport(const or_options_t *old_options,
@@ -26,4 +26,12 @@ int options_validate_server_transport(const or_options_t *old_options,
 
 int options_act_server_transport(const or_options_t *old_options);
 
+#ifdef RELAY_TRANSPORT_CONFIG_PRIVATE
+
+STATIC smartlist_t *get_options_from_transport_options_line(
+                      const char *line,
+                      const char *transport);
+
+#endif
+
 #endif /* !defined(TOR_FEATURE_RELAY_TRANSPORT_CONFIG_H) */

src/test/test_config.c

@@ -7,6 +7,7 @@
 
 #define CONFIG_PRIVATE
 #define RELAY_CONFIG_PRIVATE
+#define RELAY_TRANSPORT_CONFIG_PRIVATE
 #define PT_PRIVATE
 #define ROUTERSET_PRIVATE
 #include "core/or/or.h"