archivers/py-borgbackup: fix up incomplete 0b4a732cb0

which was incomplete because accidentally the parts I am committing
here had slipped into the main branch's "version bump" commit,
which had to be re-created for 2022Q3.

Make up for the lost bits.

PR:		265060

archivers/py-borgbackup/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	borgbackup
 DISTVERSION=	1.1.18
+PORTREVISION=	1
 CATEGORIES=	archivers python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -18,7 +19,7 @@ LIB_DEPENDS=	liblz4.so:archivers/liblz4 \
 		libxxhash.so:devel/xxhash
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}packaging>=19.0:devel/py-packaging@${PY_FLAVOR}
 
-USES=		python:3.5+ ssl
+USES=		python ssl
 USE_PYTHON=	autoplist distutils
 
 OPTIONS_DEFINE=		FUSE
@@ -28,6 +29,7 @@ FUSE_DESC=	Support to mount locally borg backup files
 FUSE_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}llfuse>0:devel/py-llfuse@${PY_FLAVOR}
 
 post-install:
+	${SETENV} PYTHONPATH=${STAGEDIR}${PYTHON_SITELIBDIR} ${STAGEDIR}${PREFIX}/bin/borg -V
 	@${FIND} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/borg/ -name "*.so" \
 		-exec ${STRIP_CMD} {} \;