remove reference to /rc/bin/reboot which was removed
as it's just to easy to do the wrong thing with this script.

Reference: /n/atom/patch/applied2013/noreboot
Date: Mon Jun 24 21:52:05 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/man/8/fshalt	Mon Jun 24 21:51:43 2013
+++ /sys/man/8/fshalt	Mon Jun 24 21:51:43 2013
@@ -37,8 +37,6 @@
 restarts the machine it is invoked on.
 .SH SOURCE
 .B /rc/bin/fshalt
-.br
-.B /rc/bin/reboot
 .SH SEE ALSO
 .IR cons (3),
 .IR reboot (8)