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-rw-r--r--subversion/include/svn_config.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/subversion/include/svn_config.h b/subversion/include/svn_config.h
index c5d697627858b..be8ec4cdb981b 100644
--- a/subversion/include/svn_config.h
+++ b/subversion/include/svn_config.h
@@ -732,6 +732,12 @@ typedef svn_error_t *
* under @a config_dir. If the callback sets its delete_cred return
* flag, delete the associated credential.
*
+ * If @a config_dir is not NULL, it must point to an alternative
+ * config directory location. If it is NULL, the default location
+ * is used.
+ *
+ * @note @a config_dir may only be NULL in 1.8.2 and later.
+ *
* @note Removing credentials from the config-based disk store will
* not purge them from any open svn_auth_baton_t instance. Consider
* using svn_auth_forget_credentials() -- from the @a cleanup_func,