feature.pm add __END__, split POD, less IO/CPU parse time

-feature.pm is 29 KB big, don't IO read or parse 22 KB of POD

feature.pm's POD in the middle is from its initial commit

69bcf1d 12/22/2011 1:46:41 AM
Create regen/feature.pl

Author: bulk88

lib/feature.pm

@@ -125,9 +125,8 @@ XXX Remove this section if F<Porting/corelist-perldelta.pl> did not add any cont
 
 =item *
 
-L<XXX> has been upgraded from version A.xx to B.yy.
-
-XXX If there was something important to note about this change, include that here.
+L<feature> has been upgraded from version 1.99 to 2.00.  Split POD and code
+and add C<__END__>.  Avoids I/O and parsing 22KB of POD in C<use feature;>.
 
 =back