Minor: Update `CHANGES' and improve documentation in `modules.cfg'.

docs/CHANGES

@@ -1,3 +1,21 @@
+CHANGES BETWEEN 2.9 and 2.9.1
+
+  I. IMPORTANT BUG FIXES
+
+    - Type  1  fonts  containing   flex  features  were  not  rendered
+      correctly (bug introduced in version 2.9).
+
+
+  II. MISCELLANEOUS
+
+    - Bug fix: Multiple calls to `FT_Get_MM_Var' returned garbage.
+
+    - The base  extensions `ftlcdfil' and  `ftfntfmt' are now  part of
+      the  base  module  (and  thus no  longer  configurable  in  file
+      `modules.cfg').
+
+
+======================================================================
 
 CHANGES BETWEEN 2.8.1 and 2.9
 
@@ -86,6 +104,7 @@ CHANGES BETWEEN 2.8.1 and 2.9
       and switch  between hexadecimal and decimal  display of integers
       (key `I').
 
+
 ======================================================================
 
 CHANGES BETWEEN 2.8 and 2.8.1

modules.cfg

@@ -66,7 +66,7 @@ FONT_MODULES += type42
 # No FT_CONFIG_OPTION_PIC support.
 FONT_MODULES += winfonts
 
-# PCF font driver.
+# PCF font driver.  If debugging and tracing is enabled, needs `ftbitmap.c'.
 # No FT_CONFIG_OPTION_PIC support.
 FONT_MODULES += pcf
 
@@ -113,11 +113,11 @@ RASTER_MODULES += smooth
 
 # FreeType's cache sub-system (quite stable but still in beta -- this means
 # that its public API is subject to change if necessary).  See
-# include/freetype/ftcache.h.  Needs ftglyph.c.
+# include/freetype/ftcache.h.  Needs `ftglyph.c'.
 # No FT_CONFIG_OPTION_PIC support.
 AUX_MODULES += cache
 
-# TrueType GX/AAT table validation.  Needs ftgxval.c below.
+# TrueType GX/AAT table validation.  Needs `ftgxval.c' below.
 #
 # No FT_CONFIG_OPTION_PIC support.
 # AUX_MODULES += gxvalid
@@ -140,7 +140,7 @@ AUX_MODULES += lzw
 # No FT_CONFIG_OPTION_PIC support.
 AUX_MODULES += bzip2
 
-# OpenType table validation.  Needs ftotval.c below.
+# OpenType table validation.  Needs `ftotval.c' below.
 #
 # No FT_CONFIG_OPTION_PIC support.
 # AUX_MODULES += otvalid
@@ -183,7 +183,7 @@ BASE_EXTENSIONS += ftbitmap.c
 # See include/freetype/ftcid.h for the API.
 BASE_EXTENSIONS += ftcid.c
 
-# Access FSType information.  Needs fttype1.c.
+# Access FSType information.  Needs `fttype1.c'.
 #
 # See include/freetype/freetype.h for the API.
 BASE_EXTENSIONS += ftfstype.c
@@ -193,7 +193,7 @@ BASE_EXTENSIONS += ftfstype.c
 # See include/freetype/ftgasp.h for the API.
 BASE_EXTENSIONS += ftgasp.c
 
-# Convenience functions to handle glyphs.  Needs ftbitmap.c.
+# Convenience functions to handle glyphs.  Needs `ftbitmap.c'.
 #
 # See include/freetype/ftglyph.h for the API.
 BASE_EXTENSIONS += ftglyph.c
@@ -223,12 +223,13 @@ BASE_EXTENSIONS += ftpatent.c
 # See include/freetype/ftpfr.h for the API.
 BASE_EXTENSIONS += ftpfr.c
 
-# Path stroker.  Needs ftglyph.c.
+# Path stroker.  Needs `ftglyph.c'.
 #
 # See include/freetype/ftstroke.h for the API.
 BASE_EXTENSIONS += ftstroke.c
 
-# Support for synthetic emboldening and slanting of fonts.  Needs ftbitmap.c.
+# Support for synthetic emboldening and slanting of fonts.  Needs
+# `ftbitmap.c'.
 #
 # See include/freetype/ftsynth.h for the API.
 BASE_EXTENSIONS += ftsynth.c