Add missing hciattach command line switches to the manual page

This patch adds some previously undocumented command line switches to
the hciattach manual page.
diff --git a/tools/hciattach.8 b/tools/hciattach.8
index f750222..b9ec23e 100644
--- a/tools/hciattach.8
+++ b/tools/hciattach.8
@@ -3,10 +3,14 @@
 hciattach \- attach serial devices via UART HCI to BlueZ stack
 .B hciattach
+.RB [\| \-b \|]
 .RB [\| \-n \|]
 .RB [\| \-p \|]
 .RB [\| \-t
 .IR timeout \|]
+.RB [\| \-s
+.IR speed \|]
+.RB [\| \-l \|]
 .I tty
 .IR type \||\| id
 .I speed
@@ -18,6 +22,9 @@
 transport interface.
+.B \-b
+Send break.
 .B \-n
 Don't detach from controlling terminal.
@@ -27,6 +34,12 @@
 .BI \-t " timeout"
 Specify an initialization timeout.  (Default is 5 seconds.)
+.BI \-s " speed"
+Specify an initial speed instead of the hardware default.
+.B \-l
+List all available configurations.
 .I tty
 This specifies the serial device to attach. A leading
 .B /dev