7z: add liblzma EOPM reference

This is useful for developers trying to understand the 7z read support code.

diff --git a/libarchive/archive_read_support_format_7zip.c b/libarchive/archive_read_support_format_7zip.c
index 84626128770273c8753e5595a261e808f8b6e9df..5954627331042f63a0f9d57c909f5eb48fa3581e 100644 (file)
--- a/libarchive/archive_read_support_format_7zip.c
+++ b/libarchive/archive_read_support_format_7zip.c
@@ -1393,7 +1393,8 @@ init_decompression(struct archive_read *a, struct _7zip *zip,
                 * size to liblzma when using lzma_raw_decoder() liblzma
                 * could correctly deal with BCJ+LZMA. But unfortunately
                 * there is no way to do that.
-                * Discussion about this can be found at XZ Utils forum.
+                *
+                * Reference: https://web.archive.org/web/20240405171610/https://www.mail-archive.com/xz-devel@tukaani.org/msg00373.html
                 */
                if (coder2 != NULL) {
                        zip->codec2 = coder2->codec;