Neutralize Canary::Stability entirely

As time goes on, the uselessness of this module only increases.
Previously, a short-circuit was used to return early from import(),
but there's no point in even wasting time to compile it anymore.
Instead, when ACTIVATE is off, replace the module entirely with
a much more functional stub.

devel/p5-Canary-Stability/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	Canary-Stability
 PORTVERSION=	2012
+PORTREVISION=	1
 CATEGORIES=	devel perl5
 MASTER_SITES=	CPAN
 MASTER_SITE_SUBDIR=	CPAN:MLEHMANN
@@ -19,9 +20,8 @@ USE_PERL5=	configure
 OPTIONS_DEFINE=	ACTIVATE
 ACTIVATE_DESC=	Enable Canary::Stability functionality
 
-# Just skip everything in this module unless activated
+# Install an empty stub
 post-patch-ACTIVATE-off:
-	@${REINPLACE_CMD} -e '/^sub import {/s/$$/ return 1; /' \
-		${WRKSRC}/Stability.pm
+	${CP} ${FILESDIR}/Stability.pm ${WRKSRC}
 
 .include <bsd.port.mk>

devel/p5-Canary-Stability/files/Stability.pm

@@ -0,0 +1,19 @@
+=head1 NAME
+
+Canary::Stability - Stub to prevent checking perl compatibility for "schmorp" modules
+
+=head1 SYNOPSIS
+
+  use Canary::Stability;
+
+=head1 PURPOSE
+
+This is a stub module that neutralizes the original Canary::Stability
+module. That module is a relic of a strange notion that "schmorp" should
+prevent people from using any Perl released after 2015.
+
+=cut
+
+package Canary::Stability;
+
+1;