.c and .i files omitted from command line reference (#3465)

Author: WalterBright

dcompiler.dd

@@ -61,7 +61,7 @@ $(H2 $(LNAME2 installation, Installation))
 $(MESSAGE_BOX gray, $(B Hint) - The official $(LINK2 $(ROOT_DIR)download.html, installer)
 performs these steps automatically.
 )
-    $(P Open a console window (for Windows XP this is done by
+    $(P Open a console window (for Windows this is done by
     clicking on [Start][Command Prompt]).
     All the tools are command line tools, which means
     they are run from a console window.
@@ -283,6 +283,10 @@ $(H2 $(LNAME2 switches, Compiler Arguments and Switches))
         $(TD D source files)
         )
         $(TR
+        $(TD $(B .c))
+        $(TD C source files)
+        )
+        $(TR
         $(TD $(B .d))
         $(TD D source files)
         )
@@ -295,6 +299,10 @@ $(H2 $(LNAME2 switches, Compiler Arguments and Switches))
         $(TD $(RELATIVE_LINK2 interface-files, D interface files))
         )
         $(TR
+        $(TD $(B .i))
+        $(TD preprocessed C source files)
+        )
+        $(TR
         $(TD $(B .$(OBJEXT)))
         $(TD Object files to link in)
         )