Latest update and remove TLSv1.3 draft

Configurations/README

@@ -118,7 +118,7 @@ In each table entry, the following keys are significant:
                            '<unistd.h>'.  This is very rarely needed.
 
         shared_extension => File name extension used for shared
-                            libraries. 
+                            libraries.
         obj_extension   => File name extension used for object files.
                            On unix, this defaults to ".o" (NOTE: this
                            is here for future use, it's not
@@ -413,7 +413,6 @@ variables:
     LIBS=libsomething
     ENGINES=libeng
     SCRIPTS=myhack
-    EXTRA=file1 file2
 
 Note that the files mentioned for PROGRAMS, LIBS and ENGINES *must* be
 without extensions.  The build file templates will figure them out.
@@ -486,48 +485,6 @@ be used in that case:
 
 NOTE: GENERATE lines are limited to one command only per GENERATE.
 
-As a last resort, it's possible to have raw build file lines, between
-BEGINRAW and ENDRAW lines as follows:
-
-    BEGINRAW[Makefile(unix)]
-    haha.h: {- $builddir -}/Makefile
-        echo "/* haha */" > haha.h
-    ENDRAW[Makefile(unix)]
-
-The word within square brackets is the build_file configuration item
-or the build_file configuration item followed by the second word in the
-build_scheme configuration item for the configured target within
-parenthesis as shown above.  For example, with the following relevant
-configuration items:
-
-   build_file   => "build.ninja"
-   build_scheme => [ "unified", "unix" ]
-
-... these lines will be considered:
-
-   BEGINRAW[build.ninja]
-   build haha.h: echo "/* haha */" > haha.h
-   ENDRAW[build.ninja]
-
-   BEGINRAW[build.ninja(unix)]
-   build hoho.h: echo "/* hoho */" > hoho.h
-   ENDRAW[build.ninja(unix)]
-
-Should it be needed because the recipes within a RAW section might
-clash with those generated by Configure, it's possible to tell it
-not to generate them with the use of OVERRIDES, for example:
-
-    SOURCE[libfoo]=foo.c bar.c
-    
-    OVERRIDES=bar.o
-    BEGINRAW[Makefile(unix)]
-    bar.o: bar.c
-    	$(CC) $(CFLAGS) -DSPECIAL -c -o $@ $<
-    ENDRAW[Makefile(unix)]
-
-See the documentation further up for more information on configuration
-items.
-
 Finally, you can have some simple conditional use of the build.info
 information, looking like this: