Add fullscreen mode as flag and config option.

surf.1

@@ -3,7 +3,7 @@
 surf \- simple webkit-based browser
 .SH SYNOPSIS
 .B surf
-.RB [-bBgGiIkKnNpPsSvx]
+.RB [-bBfgGiIkKnNpPsSvx]
 .RB [-c\ cookiefile]
 .RB [-e\ xid]
 .RB [-r\ scriptfile]
@@ -32,6 +32,9 @@ to use.
 Reparents to window specified by
 .I xid.
 .TP
+.B \-f
+Run surf in fullscreen mode.
+.TP
 .B \-g
 Disable giving the geolocation to websites.
 .TP