* src/bdf/README: Updated.

src/bdf/README

@@ -13,7 +13,7 @@ This code implements a BDF driver for the FreeType library, following the
 Adobe Specification V 2.2.  The specification of the BDF font format is
 available from Adobe's web site:
 
-  https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5005.BDF_Spec.pdf
+  https://adobe-type-tools.github.io/font-tech-notes/pdfs/5005.BDF_Spec.pdf
 
 Many good bitmap fonts in bdf format come with XFree86 (www.XFree86.org).
 They do not define vertical metrics, because the X Consortium BDF
@@ -23,6 +23,10 @@ specification has removed them.
 Encodings
 *********
 
+[This section is out of date, retained for historical reasons.  BDF
+ properties can be retrieved with `FT_Get_BDF_Property`, character set ID
+ values with `FT_Get_BDF_Charset_ID`.]
+
 The variety of encodings that accompanies bdf fonts appears to encompass the
 small set defined in freetype.h.  On the other hand, two properties that
 specify encoding and registry are usually defined in bdf fonts.