Transform file names when updating and appendig to archives.

This complements 28e91b48.

* src/common.h (transform_stat_info): New prototype.
* src/list.c (transform_stat_info): Remove static qualifier.
* src/update.c (update_archive): Call transform_stat_info.
* tests/Makefile.am (TESTSUITE_AT): Add append03.at
* tests/testsuite.at: Include append03.at

src/common.h

@@ -550,6 +550,7 @@ extern size_t recent_long_link_blocks;
 
 void decode_header (union block *header, struct tar_stat_info *stat_info,
 		    enum archive_format *format_pointer, int do_user_group);
+void transform_stat_info (int typeflag, struct tar_stat_info *stat_info);
 char const *tartime (struct timespec t, bool full_time);
 
 #define OFF_FROM_HEADER(where) off_from_header (where, sizeof (where))

src/list.c

@@ -116,7 +116,7 @@ transform_member_name (char **pinput, int type)
   return transform_name_fp (pinput, type, decode_xform, &type);
 }
 
-static void
+void
 transform_stat_info (int typeflag, struct tar_stat_info *stat_info)
 {
   if (typeflag == GNUTYPE_VOLHDR)

src/update.c

@@ -130,6 +130,8 @@ update_archive (void)
 
 	    decode_header (current_header, &current_stat_info,
 			   &current_format, 0);
+	    transform_stat_info (current_header->header.typeflag,
+				 &current_stat_info);
 	    archive_format = current_format;
 
 	    if (subcommand_option == UPDATE_SUBCOMMAND