integrate cfgperl contents into mainline

p4raw-id: //depot/perl@4106

diff --cc perl.h
Simple merge

diff --cc pod/perldelta.pod
index cf97559,69beac3..94b4635
--- 1/pod/perldelta.pod
--- 2/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@@ -732,6 -725,6 +725,13 @@@ like in the first argument to C<join>
  or false result of matching the pattern against $_ as the string,
  which is probably not what you had in mind.
  
++=item /%s/ should probably be written as "%s"
++
++(W) You have used a pattern where Perl expected to find a string,
++like in the first argument to C<join>.  Perl will treat the true
++or false result of matching the pattern against $_ as the string,
++which is probably not what you had in mind.
++
  =head1 Obsolete Diagnostics
  
  Todo.

diff --cc pp.c
Simple merge

diff --cc pp_hot.c
Simple merge