Fix manpage errors

Split long unbreakable lines to smaller sections.

Spotted by Debian Lintian tool:
http://lintian.debian.org/full/[email protected]#qemu

Signed-off-by: Blue Swirl <[email protected]>
diff --git a/qemu-options.hx b/qemu-options.hx
index fd50add..8450b45 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -852,7 +852,7 @@
 @findex -smbios
 Specify SMBIOS type 0 fields
 
-@item -smbios type=1[,manufacturer=@var{str}][,product=@var{str}][,version=@var{str}][,serial=@var{str}][,uuid=@var{uuid}][,sku=@var{str}][,family=@var{str}]
+@item -smbios type=1[,manufacturer=@var{str}][,product=@var{str}] [,version=@var{str}][,serial=@var{str}][,uuid=@var{uuid}][,sku=@var{str}] [,family=@var{str}]
 Specify SMBIOS type 1 fields
 ETEXI
 
@@ -932,7 +932,7 @@
 #endif
     "socket],id=str[,option][,option][,...]\n")
 STEXI
-@item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}][,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
+@item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}] [,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
 @findex -net
 Create a new Network Interface Card and connect it to VLAN @var{n} (@var{n}
 = 0 is the default). The NIC is an e1000 by default on the PC
@@ -1063,7 +1063,7 @@
 syntax gives undefined results. Their use for new applications is discouraged
 as they will be removed from future versions.
 
-@item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}][,script=@var{file}][,downscript=@var{dfile}]
+@item -net tap[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,ifname=@var{name}] [,script=@var{file}][,downscript=@var{dfile}]
 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
@@ -1083,7 +1083,7 @@
                -net nic,vlan=1 -net tap,vlan=1,ifname=tap1
 @end example
 
-@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
+@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,listen=[@var{host}]:@var{port}][,connect=@var{host}:@var{port}]
 
 Connect the VLAN @var{n} to a remote VLAN in another QEMU virtual
 machine using a TCP socket connection. If @option{listen} is
@@ -1103,7 +1103,7 @@
                -net socket,connect=127.0.0.1:1234
 @end example
 
-@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}][,mcast=@var{maddr}:@var{port}]
+@item -net socket[,vlan=@var{n}][,name=@var{name}][,fd=@var{h}] [,mcast=@var{maddr}:@var{port}]
 
 Create a VLAN @var{n} shared with another QEMU virtual
 machines using a UDP multicast socket, effectively making a bus for
@@ -1143,7 +1143,7 @@
 /path/to/linux ubd0=/path/to/root_fs eth0=mcast
 @end example
 
-@item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}][,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
+@item -net vde[,vlan=@var{n}][,name=@var{name}][,sock=@var{socketpath}] [,port=@var{n}][,group=@var{groupname}][,mode=@var{octalmode}]
 Connect VLAN @var{n} to PORT @var{n} of a vde switch running on host and
 listening for incoming connections on @var{socketpath}. Use GROUP @var{groupname}
 and MODE @var{octalmode} to change default ownership and permissions for