drop the 5

This commit drop PERL_REVISION from $] and $^V.

Since $^V expects 3 components, we add a .0 at the end.

Porting/makerel

@@ -62,11 +62,10 @@ my @patchlevel_h = <PATCHLEVEL>;
 close PATCHLEVEL;
 my $patchlevel_h = join "", grep { /^#\s*define/ } @patchlevel_h;
 print $patchlevel_h;
-my $revision = $1 if $patchlevel_h =~ /PERL_REVISION\s+(\d+)/;
 my $patchlevel = $1 if $patchlevel_h =~ /PERL_VERSION\s+(\d+)/;
 my $subversion = $1 if $patchlevel_h =~ /PERL_SUBVERSION\s+(\d+)/;
 die "Unable to parse patchlevel.h" unless $subversion >= 0;
-my $vers = sprintf("%d.%d.%d", $revision, $patchlevel, $subversion);
+my $vers = sprintf("%d.%d", $patchlevel, $subversion);
 
 # fetch list of local patches
 my (@local_patches, @lpatch_tags, $lpatch_tags);

perl.h

@@ -5351,12 +5351,10 @@ EXTERN_C char **environ;  /* environment variables supplied via exec */
 #include "patchlevel.h"
 #undef PERL_PATCHLEVEL_H_IMPLICIT
 
-#define PERL_VERSION_STRING	STRINGIFY(PERL_REVISION) "." \
-                                STRINGIFY(PERL_VERSION) "." \
-                                STRINGIFY(PERL_SUBVERSION)
+#define PERL_VERSION_STRING	STRINGIFY(PERL_VERSION) "." \
+                                STRINGIFY(PERL_SUBVERSION) ".0"
 
-#define PERL_API_VERSION_STRING	STRINGIFY(PERL_API_REVISION) "." \
-                                STRINGIFY(PERL_API_VERSION) "." \
+#define PERL_API_VERSION_STRING	STRINGIFY(PERL_API_VERSION) "." \
                                 STRINGIFY(PERL_API_SUBVERSION)
 
 START_EXTERN_C