update Glenn McGrath's email address

diff --git a/archival/libunarchive/decompress_unzip.c b/archival/libunarchive/decompress_unzip.c
index ead628e..275f80b 100644
--- a/archival/libunarchive/decompress_unzip.c
+++ b/archival/libunarchive/decompress_unzip.c
@@ -12,7 +12,7 @@
  * command line handling.
  *
  * General cleanup to better adhere to the style guide and make use of standard
- * busybox functions by Glenn McGrath <bug1@iinet.net.au>
+ * busybox functions by Glenn McGrath
  *
  * read_gz interface + associated hacking by Laurence Anderson
  *