INDEX.fonts: Minor maintenance

+ Mention relevance of this file in the vt manual screen.font entry
+ The vidfont manual is in section one, not eight
+ Remove leftover blank line from freebsd tag removal

MFC after:	3 days

share/man/man4/vt.4

@@ -285,6 +285,9 @@ to the number.
 .It Va screen.font
 Set this value to the base name of the desired font file located in
 .Pa /boot/fonts .
+The font must be specified in the
+.Pa INDEX.fonts
+file located there.
 Fonts can be converted for use with
 .Xr vtfontcvt 8 .
 .El

share/syscons/fonts/INDEX.fonts

@@ -1,6 +1,5 @@
 #
-#
-# database for vidfont(8)
+# database for vidfont(1)
 #
 # Format <file>:<lang>:<description>
 #

share/vt/fonts/INDEX.fonts

@@ -1,6 +1,5 @@
 #
-#
-# database for vidfont(8)
+# database for vidfont(1)
 #
 # Format <file>:<lang>:<description>
 #

stand/fonts/INDEX.fonts

@@ -1,6 +1,5 @@
 #
-#
-# database for vidfont(8)
+# database for vidfont(1)
 #
 # Format <file>:<lang>:<description>
 #