FreeBSD: Kill only takes pid & signal

Cosmetic fix.  The FreeBSD system call only takes two
arguments.

http://fxr.watson.org/fxr/source/kern/kern_sig.c?im=bigexcerpts#L1678

R=dho, rsc
CC=golang-dev
https://golang.org/cl/202051

src/pkg/syscall/syscall_freebsd.go

@@ -454,10 +454,6 @@ func SysctlUint32(name string) (value uint32, errno int) {
 	return *(*uint32)(unsafe.Pointer(&buf[0])), 0
 }
 
-//sys	kill(pid int, signum int, posix int) (errno int)
-
-func Kill(pid int, signum int) (errno int) { return kill(pid, signum, 1) }
-
 // TODO: wrap
 //	Acct(name nil-string) (errno int)
 //	Futimes(fd int, timeval *Timeval) (errno int)	// Pointer to 2 timevals!
@@ -515,6 +511,7 @@ func Kill(pid int, signum int) (errno int) { return kill(pid, signum, 1) }
 //sys	Gettimeofday(tv *Timeval) (errno int)
 //sys	Getuid() (uid int)
 //sys	Issetugid() (tainted bool)
+//sys	Kill(pid int, signum int) (errno int)
 //sys	Kqueue() (fd int, errno int)
 //sys	Lchown(path string, uid int, gid int) (errno int)
 //sys	Link(path string, link string) (errno int)

src/pkg/syscall/zsyscall_freebsd_386.go

@@ -370,8 +370,8 @@ func Issetugid() (tainted bool) {
 	return
 }
 
-func kill(pid int, signum int, posix int) (errno int) {
-	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(signum), uintptr(posix))
+func Kill(pid int, signum int) (errno int) {
+	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(signum), 0)
 	errno = int(e1)
 	return
 }

src/pkg/syscall/zsyscall_freebsd_amd64.go

@@ -370,8 +370,8 @@ func Issetugid() (tainted bool) {
 	return
 }
 
-func kill(pid int, signum int, posix int) (errno int) {
-	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(signum), uintptr(posix))
+func Kill(pid int, signum int) (errno int) {
+	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(signum), 0)
 	errno = int(e1)
 	return
 }