Update Moshe Zadka's email address to one works and might last a while.
diff --git a/Doc/lib/libmutex.tex b/Doc/lib/libmutex.tex
index 773f9eb..a493682 100644
--- a/Doc/lib/libmutex.tex
+++ b/Doc/lib/libmutex.tex
@@ -3,7 +3,7 @@
Mutual exclusion support}
\declaremodule{standard}{mutex}
-\sectionauthor{Moshe Zadka}{mzadka@geocities.com}
+\sectionauthor{Moshe Zadka}{moshez@zadka.site.co.il}
\modulesynopsis{Lock and queue for mutual exclusion.}
The \module{mutex} defines a class that allows mutual-exclusion