Change hyphen to minus in manpage

--- a/docs/nc6.1.in
+++ b/docs/nc6.1.in
@@ -69,19 +69,19 @@
 .TP 13
 .I \-b, --bluetooth
 With this option set, netcat6 will use bluetooth to establish connections.
-By default the L2CAP protocol will be used (also see '--sco').
+By default the L2CAP protocol will be used (also see '\-\-sco').
 .TP 13
 .I \--buffer-size=BYTES
 Set the buffer size for the local and remote endpoints.
 netcat6 does all reads into these buffers, so they should be large enough
 to minimize excessive reads from the socket and in UDP mode it should be large
-enough to receive an entire datagram (also see '--nru').  By default, the
+enough to receive an entire datagram (also see '\-\-nru').  By default, the
 buffer size is 8 kilobytes for TCP connections and 128 kilobytes for UDP.
 .TP 13
 .I \--continuous
 Enable continuous accepting of connections in listen mode, like inetd.  Must
-be used with --exec to specify the command to run locally (try 'nc6
---continuous --exec cat -l -p <port>' to make a simple echo server).
+be used with \-\-exec to specify the command to run locally (try 'nc6
+\-\-continuous \-\-exec cat \-l \-p <port>' to make a simple echo server).
 .TP 13
 .I \--disable-nagle
 Disable the use of the Nagle algorithm for TCP connections (see "NAGLE
@@ -153,7 +153,7 @@
 .TP 13
 .I \--sco
 With this option set, netcat6 with use SCO over bluetooth
-(note that '-b' or '--bluetooth' must also be specified).
+(note that '\-b' or '\-\-bluetooth' must also be specified).
 .TP 13
 .I \--send-only
 Only send data, don't receive.  This also disables any hold timeouts.
@@ -180,13 +180,13 @@
 .TP 13
 .I \-x, --transfer
 File transfer mode (see "FILE TRANSFER").  If listen mode is
-specified, this is equivalent to "--recv-only --buffer-size=65536" otherwise
-it is equivalent to "--send-only --buffer-size=65536".
+specified, this is equivalent to "\-\-recv-only \-\-buffer-size=65536" otherwise
+it is equivalent to "\-\-send-only \-\-buffer-size=65536".
 .I \-X, --rev-transfer
 Reverse file transfer mode (see "FILE TRANSFER").  This transfers in the
 opposite direction to normal transfer.  If listen mode is specified, this is
-equivalent to "--send-only --buffer-size=65536" otherwise it is equivalent to
-"--recv-only --buffer-size=65536".
+equivalent to "\-\-send-only \-\-buffer-size=65536" otherwise it is equivalent to
+"\-\-recv-only \-\-buffer-size=65536".
 .SH UDP
 UDP support in netcat6 works very well in both connect and in listen mode.
 When using UDP in listen mode netcat6 accepts UDP packets from any source that
@@ -205,13 +205,13 @@
 .P
 netcat6 allows for fine control over the buffer sizes, MTU's and NRU's for the
 connection, which is especially useful for UDP connections.  See the
---buffer-size, --mtu and --nru options.
+\-\-buffer-size, \-\-mtu and \-\-nru options.
 .SH TIMEOUTS
 netcat6 currently implements a connect/accept timeout, and idle timeout, and
 hold timeouts on both the remote and local endpoints.
 .IP \(bu 4
-The connect/accept timeout is optional and is specified with the -w or
---timeout option.  If a connection cannot be established within the specified
+The connect/accept timeout is optional and is specified with the \-w or
+\-\-timeout option.  If a connection cannot be established within the specified
 time, nc6 will exit with a non-zero exit status.  If the option is not
 specified, nc6 will wait forever when listening for new connections
 (in listen mode), and will use the standard operating system timeout when
@@ -219,7 +219,7 @@
 essentially ignored when creating UDP connections to a remote server, as UDP
 is a connectionless protocol.
 .IP \(bu 4
-The idle timeout is optional and is specified with the -t or --idle-timeout
+The idle timeout is optional and is specified with the \-t or \-\-idle-timeout
 option.  If no data is sent or received from the remote host in the specified
 time, nc6 will exit with a non-zero exit status.  The default is to not
 timeout idle connections.
@@ -244,7 +244,7 @@
 default.
 .SH FILE TRANSFER
 netcat6 can be used to transfer files and data streams efficiently, using the
-\'-x' or '--transfer' command line option (or the '-X' and '--rev-transfer'
+\'\-x' or '\-\-transfer' command line option (or the '\-X' and '\-\-rev-transfer'
 equivalents for transfer in the opposite direction).
 .P
 For example, to transfer a file from machine 'foo.example.com' to machine
@@ -253,32 +253,32 @@
 On 'bar', set up a listening nc6 on any local port:
 .RS
 
-bar$ nc6 -x -l -p 7676 > targetfile
+bar$ nc6 \-x \-l \-p 7676 > targetfile
 
 .RE
 Then on 'foo', use nc6 to send the file to the listening nc6:
 .RS
 
-foo$ nc6 -x bar.example.com 7676 < sourcefile
+foo$ nc6 \-x bar.example.com 7676 < sourcefile
 
 .RE
 You can also use file transfer mode to pipe the output of programs over
 networks.  For example, you can use tar with nc6 to copy entire directories:
 .RS
 
-bar$ nc6 -x -l -p 7676 | tar xpzf -
+bar$ nc6 \-x \-l \-p 7676 | tar xpzf \-
 
-foo$ tar cpzf - /home | nc6 -x bar.example.com 7676
+foo$ tar cpzf \- /home | nc6 \-x bar.example.com 7676
 
 .RE
-The '-x' or '--transfer' option is just an alias for various other options
+The '\-x' or '\-\-transfer' option is just an alias for various other options
 which set the direction of transfer and increase the buffer sizes used.  In
-listen mode, it is equivalent to "--recv-only --buffer-size=65536" otherwise
-it is equivalent to "--send-only --buffer-size=65536".
+listen mode, it is equivalent to "\-\-recv-only \-\-buffer-size=65536" otherwise
+it is equivalent to "\-\-send-only \-\-buffer-size=65536".
 .P
 The normal file transfer mode options assume the file will be sent TO the
 netcat6 process that is in listen mode, FROM the netcat6 process that is
-connecting to it.  To transfer the other way use the -X or --rev-transfer
+connecting to it.  To transfer the other way use the \-X or \-\-rev-transfer
 options.
 .SH HALF CLOSE
 Stream based data transfers, such as TCP, have 2 separate streams - the
@@ -299,7 +299,7 @@
 transmit stream after they send their request.  In default mode, netcat6 will
 close the entire connection before sending the response back to the client.
 .P
-However, by specifying the "--half-close" option, netcat6 will keep trying to
+However, by specifying the "\-\-half-close" option, netcat6 will keep trying to
 send data to the remote server after the receive stream has closed.  It will
 also close the remote transmit stream when there is no more data to send
 (EOF has been received on stdin).
@@ -324,7 +324,7 @@
 algorithm on most systems, using the TCP_NODELAY socket option.
 .P
 .B netcat6
-provides the '--disable-nagle' command line option to disable the Nagle
+provides the '\-\-disable-nagle' command line option to disable the Nagle
 algorithm for the connection.
 .SH ERRORS
 .B netcat6
@@ -337,7 +337,7 @@
 to the stdout without any errors.  It DOES NOT indicate whether all data read
 from stdin has been successfully sent to the remote machine.
 .P
-In --half-close mode, nc6 exists successfully when an EOF has been received
+In \-\-half-close mode, nc6 exists successfully when an EOF has been received
 from both the remote machine AND from stdin, and all data has been
 successfully sent.  Thus the exit status indicates that all data was
 transfered successfully.