Release cperl-5.26.0

This release biggest features are more support for user-types and unicode
security, better hash security, no ' package seperator anymore.
NULL ops are now removed by default, better loops, minor compiler optimizations.
Preparation for the jit with improved .pmc loading.

And of course ongoing damage control: reviving for qw() loops, undoing
binary names, undoing acceptance of binary symbols (silently added with
5.16), undoing the removal of use encoding.

Fixed some critical core modules, such as Storable, ExtUtils::Constant,
enhanced use base with readonly @isa by default.
Upstream caught up with the cperl 5.22 .  in @inc security fixes and renamed
the feature flag from -Dfortify_inc to -Ddefault_inc_excludes_dot.

Benchmark-wise nothing much changed, it even got relatively a bit slower
with the added unicode identifier security overhead on use utf8.
Absolutely it is only 3% faster then 5.24c, and 1% than 5.26 in the
benchmark code. With real code the signature advantages still make it
~20-40% faster.

Current status at http://perl11.org/cperl/STATUS.html
Changes at http://perl11.org/cperl/perlcdelta.html
Overview at http://perl11.org/cperl/perlcperl.html

Author: rurban

.git-rr-cache

@@ -128,7 +128,7 @@
          "vxs.inc"
       ]
    },
-   "release_status" : "testing",
+   "release_status" : "stable",
    "resources" : {
       "bugtracker" : {
          "web" : "http://github.com/perl11/cperl/issues"

META.json

@@ -133,7 +133,6 @@ hunk.
 #  endif
 static const char * const local_patches[] = {
 	NULL
-	,"RC1"
 #ifdef PERL_GIT_UNCOMMITTED_CHANGES
 	,"uncommitted-changes"
 #endif

patchlevel.h

@@ -633,6 +633,7 @@ the strings?).
  rurban    5.25.3c      2016-Feb-23
 
  rurban    5.26.0c-RC1  2017-Apr-19     cperl 5.26
+ rurban    5.26.0       2017-Apr-25
 
 =head2 SELECTED RELEASE MEMORY USAGE