Include unix socket in vncviewer usage
We've had support for unix sockets for a while now. Make sure this
is reflected in the -help output and the man page.
Also make some minor tweaks to the section to get everything in
sync with reality.
diff --git a/vncviewer/vncviewer.man b/vncviewer/vncviewer.man
index 729c01d..421290f 100644
--- a/vncviewer/vncviewer.man
+++ b/vncviewer/vncviewer.man
@@ -11,13 +11,17 @@
.RI [ host ][:: port ]
.br
.B vncviewer
+.RI [ options ]
+.RI [ unix\ socket ]
+.br
+.B vncviewer
.RI [ options ]
.B \-listen
.RI [ port ]
.br
.B vncviewer
.RI [ options ]
-.RI [ .tigervnc file ]
+.RI [ .tigervnc\ file ]
.SH DESCRIPTION
.B vncviewer
is a viewer (client) for Virtual Network Computing. This manual page documents