Updated.

svn path=/trunk/mono/; revision=118023

man/mcs.1

@@ -361,6 +361,9 @@ Shows the compiler version.
 .I \-warnaserror, \-warnaserror+
 Treat warnings as errors.
 .TP
+.I \-warnaserror:W1,[Wn]
+Treats one or more compiler warnings as errors.
+.TP
 .I \-warn:LEVEL
 Sets the warning level.  0 is the lowest warning level, and 4 is the
 highest.  The default is 4.