qemu-doc.texi: rewrite the documentation for the -net option

Addresses comments from Jamie Lokier.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5807 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/qemu-doc.texi b/qemu-doc.texi
index 16ec1ff..6ae3ca0 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -617,14 +617,14 @@
 hostname reported by the builtin DHCP server.
 
 @item -net tap[,vlan=@var{n}][,fd=@var{h}][,ifname=@var{name}][,script=@var{file}][,downscript=@var{dfile}]
-Connect the host TAP network interface @var{name} to VLAN @var{n} and
-use the network script @var{file} to configure it. The default
-network script is @file{/etc/qemu-ifup}. Use @option{script=no} to
-disable script execution. If @var{name} is not provided, the OS automatically
-provides one. Use network script @var{dfile} to deconfigure the interface. Use
-@option{downscript=no} to disable script execution. @option{fd}=@var{h} can be
-used to specify the handle of an already opened host TAP interface.
-Example:
+Connect the host TAP network interface @var{name} to VLAN @var{n}, use
+the network script @var{file} to configure it and the network script 
+@var{dfile} to deconfigure it. If @var{name} is not provided, the OS 
+automatically provides one. @option{fd}=@var{h} can be used to specify
+the handle of an already opened host TAP interface. The default network 
+configure script is @file{/etc/qemu-ifup} and the default network 
+deconfigure script is @file{/etc/qemu-ifdown}. Use @option{script=no} 
+or @option{downscript=no} to disable script execution. Example:
 
 @example
 qemu linux.img -net nic -net tap