change to sources w/o patch.

note, that we still don't support %C (this is the client's problem),
but we do support answering questions for all local subnets, and
thus don't need the big BUGS entry.

Reference: /n/atom/patch/applied/dhcpd8sleep
Date: Sat Mar 22 18:52:21 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/man/8/dhcpd	Sat Mar 22 18:51:14 2014
+++ /sys/man/8/dhcpd	Sat Mar 22 18:51:14 2014
@@ -203,11 +203,11 @@
 would have done.
 .TP
 .B s
-Sleep 2 seconds before answering requests for static addresses.
+Sleep roughly 1 to 2 seconds before answering requests for static addresses.
 This is used to make a server be a backup only.
 .TP
 .B S
-Sleep 2 seconds before answering requests for dynamic addresses.
+Sleep roughly 1 to 2 seconds before answering requests for dynamic addresses.
 .TP
 .B x
 The IP stack to use is mounted at