Rename int_*() functions to *_int()

There is a preference for suffixes to indicate that a function is internal
rather than prefixes. Note: the suffix is only required to disambiguate
internal functions and public symbols with the same name (but different
case)

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>

include/internal/conf.h

@@ -51,9 +51,9 @@ struct ossl_init_settings_st {
     char *config_name;
 };
 
-void int_openssl_config(const char *config_name);
-void int_openssl_no_config(void);
-void int_conf_modules_free(void);
+void openssl_config_int(const char *config_name);
+void openssl_no_config_int(void);
+void conf_modules_free_int(void);
 
 #ifdef __cplusplus
 }