[[[
Fix issue #2363: Ignore unreadable files with a warning.

 * subversion/libsvn_subr/config_file.c
   (svn_config__parse_file): If must_exist is false also ignore EACCESS
   errors, but printing a warning to stderr.

 * subversion/include/svn_config.h: Adjust docs to the new behaviour.
]]]
Index: subversion/include/svn_config.h
===================================================================
--- subversion/include/svn_config.h	(revision 24309)
+++ subversion/include/svn_config.h	(working copy)
@@ -146,8 +146,8 @@
 /** Read configuration data from @a file (a file or registry path) into
  * @a *cfgp, allocated in @a pool.
  *
- * If @a file does not exist, then if @a must_exist, return an error,
- * otherwise return an empty @c svn_config_t.
+ * If @a file does not exist or cannot be read, then if @a must_exist,
+ * return an error, otherwise return an empty @c svn_config_t.
  */
 svn_error_t *svn_config_read(svn_config_t **cfgp,
                              const char *file,
Index: subversion/libsvn_subr/config_file.c
===================================================================
--- subversion/libsvn_subr/config_file.c	(revision 24309)
+++ subversion/libsvn_subr/config_file.c	(working copy)
@@ -401,6 +401,12 @@
       svn_error_clear(err);
       return SVN_NO_ERROR;
     }
+  else if (! must_exist && err && APR_STATUS_IS_EACCES(err->apr_err))
+    {
+      svn_handle_warning(stderr, err);
+      svn_error_clear(err);
+      return SVN_NO_ERROR;
+    }
   else
     SVN_ERR(err);