Fix handling of the path containing SSL certs.

Thanks to medfly/coypu for noticing that!

Index: Makefile
===================================================================
RCS file: /cvsroot/pkgsrc/www/netsurf/Makefile,v
retrieving revision 1.50
diff -u -p -r1.50 Makefile
--- Makefile	5 Mar 2016 11:29:38 -0000	1.50
+++ Makefile	4 Apr 2016 08:42:17 -0000
@@ -2,7 +2,7 @@
 
 DISTNAME=	netsurf-all-3.4
 PKGNAME=	${DISTNAME:S/-all//}
-PKGREVISION=	1
+PKGREVISION=	2
 CATEGORIES=	www
 MASTER_SITES=	http://download.netsurf-browser.org/netsurf/releases/source-full/
 
@@ -18,6 +18,14 @@ BUILD_DEPENDS+=	p5-HTML-Parser-[0-9]*:..
 BUILD_TARGET=	build
 USE_TOOLS+=	bison flex gmake perl:build pax pkg-config
 
+SUBST_CLASSES+=			ssl-certs
+SUBST_STAGE.ssl-certs=		pre-configure
+SUBST_MESSAGE.ssl-certs=	Fixing hardcoded paths for SSL certs
+SUBST_FILES.ssl-certs=		netsurf/beos/gui.cpp netsurf/gtk/gui.c
+SUBST_FILES.ssl-certs+=		netsurf/test/data/Choices
+SUBST_FILES.ssl-certs+=		netsurf/test/nsoption.c
+SUBST_SED.ssl-certs=		-e 's,/etc/ssl/certs,${SSLCERTS},'
+
 # Avoid possible problems with shells that defines HOST
 MAKE_ENV+=	BUILD="${MACHINE_GNU_ARCH}--${LOWER_OPSYS}"
 MAKE_ENV+=	HOST="${MACHINE_GNU_ARCH}--${LOWER_OPSYS}"