Removed reference to /sys/src/cmd/unvac.
Reference: /n/sources/patch/applied/man-1-vac-unvac
Date: Sat May  7 17:01:36 CES 2011
Signed-off-by: djc@9grid.fr

--- /sys/man/1/vac	Sat May  7 16:58:58 2011
+++ /sys/man/1/vac	Sat May  7 16:58:55 2011
@@ -169,8 +169,6 @@
 If listing files, print metadata in addition to the names.
 .SH SOURCE
 .B /sys/src/cmd/vac
-.br
-.B /sys/src/cmd/unvac
 .SH "SEE ALSO"
 .IR vacfs (4),
 .IR venti (8)