update usage

src/cmd/sam/io.c

diff --git a/src/cmd/sam/io.c b/src/cmd/sam/io.c
index 8b6f281..95c2e0c 100644
--- a/src/cmd/sam/io.c
+++ b/src/cmd/sam/io.c
@@ -226,7 +226,7 @@
 	// count args
 	for(av = argv; *av; av++)
 		;
-	av = malloc(sizeof(char*)*((av-argv) + 10));
+	av = malloc(sizeof(char*)*((av-argv) + 5));
 	if(av == nil){
 		dprint("out of memory\n");
 		exits("fork/exec");
@@ -234,8 +234,6 @@
 	ac = 0;
 	av[ac++] = RX;
 	av[ac++] = machine;
-	if(rxopt)
-		av[ac++] = rxopt;
 	av[ac++] = rsamname;
 	av[ac++] = "-R";
 	while(*argv)

src/cmd/sam/sam.c

diff --git a/src/cmd/sam/sam.c b/src/cmd/sam/sam.c
index 01893cb..d17f235 100644
--- a/src/cmd/sam/sam.c
+++ b/src/cmd/sam/sam.c
@@ -30,7 +30,6 @@
 long	seq;
 
 char *winsize;
-char *rxopt;
 
 Rune	baddir[] = { '<', 'b', 'a', 'd', 'd', 'i', 'r', '>', '\n'};
 
@@ -57,9 +56,6 @@
 	case 'R':
 		Rflag++;
 		break;
-	case 'O':
-		rxopt = EARGF(usage());
-		break;
 	case 't':
 		samterm = EARGF(usage());
 		break;

src/cmd/sam/sam.h

diff --git a/src/cmd/sam/sam.h b/src/cmd/sam/sam.h
index bb88c33..eefb4b3 100644
--- a/src/cmd/sam/sam.h
+++ b/src/cmd/sam/sam.h
@@ -348,7 +348,6 @@
 extern char	SHPATH[];
 extern char	RX[];
 extern char	RXPATH[];
-extern char	*rxopt;
 
 /*
  * acme globals