Matched the usage() flags to the man page.  Added the missing 'Z' option
to them.
Updated the man page to include the new option and the source of the dhcpd
programs.

Reference: /n/sources/patch/applied/dhcpd_take_2
Date: Sat Mar  3 07:25:40 CET 2007
Signed-off-by: lucio@proxima.alt.za

--- /sys/src/cmd/ip/dhcpd/dhcpd.c	Sat Mar  3 07:22:24 2007
+++ /sys/src/cmd/ip/dhcpd/dhcpd.c	Sat Mar  3 07:21:54 2007
@@ -57,6 +57,7 @@
 int	pptponly;	// only answer request that came from the pptp server
 int	mute, mutestat;
 int	minlease = MinLease;
+int staticlease = StaticLease;
 
 ulong	start;
 
@@ -199,7 +200,7 @@
 void
 usage(void)
 {
-	fprint(2, "usage: dhcp [-dmsnp] [-f directory] [-x netmtpt] [-M minlease] addr n [addr n ...]\n");
+ 	fprint(2, "usage: dhcp [-mdsSnprZ] [-f directory] [-x netmtpt] [-M minlease] [-Z staticlease] addr n [addr n ...]\n");
 	exits("usage");
 }
 
@@ -259,6 +260,17 @@
 		if(minlease <= 0)
 			minlease = MinLease;
 		break;
+ 	case 'Z':
+ 		p = ARGF();
+ 		if(p == nil)
+ 			usage();
+ 		staticlease = atoi(p);
+ 		if(staticlease <= 0)
+ 			staticlease = StaticLease;
+ 		break;
+ 	default:
+ 		usage();
+ 		break;
 	} ARGEND;
 
 	while(argc > 1){
@@ -428,7 +440,7 @@
 	Binding *b, *nb;
 
 	if(rp->staticbinding){
-		sendoffer(rp, rp->ii.ipaddr, (StaticLease > minlease ? StaticLease : minlease));
+ 		sendoffer(rp, rp->ii.ipaddr, (staticlease > minlease ? staticlease : minlease));
 		return;
 	}
 
@@ -486,7 +498,7 @@
 		/* check for hard assignment */
 		if(rp->staticbinding){
 			if(forme(rp->server))
-				sendack(rp, rp->ii.ipaddr, (StaticLease > minlease ? StaticLease : minlease), 1);
+				sendack(rp, rp->ii.ipaddr, (staticlease > minlease ? staticlease : minlease), 1);
 			else
 				warning(0, "!Request(%s via %I): for server %I not me",
 					rp->id, rp->gii.ipaddr, rp->server);
@@ -543,7 +555,7 @@
 					rp->id, rp->gii.ipaddr, rp->ip, rp->bp->chaddr);
 				sendnak(rp, "not valid");
 			}
-			sendack(rp, rp->ii.ipaddr, (StaticLease > minlease ? StaticLease : minlease), 1);
+			sendack(rp, rp->ii.ipaddr, (staticlease > minlease ? staticlease : minlease), 1);
 			return;
 		}
 
@@ -585,7 +597,7 @@
 					rp->id, rp->gii.ipaddr, rp->ciaddr);
 				sendnak(rp, "not valid");
 			}
-			sendack(rp, rp->ii.ipaddr, (StaticLease > minlease ? StaticLease : minlease), 1);
+			sendack(rp, rp->ii.ipaddr, (staticlease > minlease ? staticlease : minlease), 1);
 			return;
 		}
 
--- /sys/man/8/dhcpd	Sat Mar  3 07:23:14 2007
+++ /sys/man/8/dhcpd	Sat Mar  3 07:23:03 2007
@@ -4,13 +4,15 @@
 .SH SYNOPSIS
 .PP
 .B ip/dhcpd
-.RB [ -mdsSnpr ]
+.RB [ -mdsSnprZ ]
 .RB [ -f
 .IR ndb-file ]
 .RB [ -x
 .IR netmtpt ]
 .RB [ -M
 .IR secs ]
+.RB [ -Z
+.IR secs ]
 [
 .I address
 .I n
@@ -210,7 +212,12 @@
 .B M
 Use
 .I secs
-as the minimum lease time.
+as the minimum lease time for dynamic addresses.
+.TP
+.B Z
+Use
+.I secs
+as the minimum lease time for static addresses.
 .PD
 .PP
 .I Dhcpleases
@@ -285,5 +292,7 @@
 .BR /lib/ndb/dhcp "    directory of dynamic address files
 .SH SOURCE
 .B /sys/src/cmd/ip
+.br
+.B /sys/src/cmd/ip/dhcpd
 .SH "SEE ALSO"
 .IR ndb (6)