net/py-libdnet: Fix build with both python 2 and 3

I have reviewed the code of net/libdnet. And created a fork as the
evelopment seems stalled by the original author.
- Removed all the codes not related to FreeBSD
- Fix configure script to find related header files and now it builds
  relevant source files instead of *-none.c files
- Modernized all build tools configuration file and removed unnecessary
  files
- Works at least with PF. Still not working with ipfw2/ipfilter.
- Python package now supports both Python 2 and 3

The repo location is:
https://github.com/5u623l20/libdnet/

PR:		236643
Submitted by:	bofh
Approved by:	maintainer-timeout

net/py-libdnet/Makefile

@@ -8,17 +8,18 @@ COMMENT=	Python module for libdnet
 
 LIB_DEPENDS=	libdnet.so:net/libdnet
 
+USES=		autoreconf libtool python
+
 MASTERDIR=	${.CURDIR}/../libdnet
 INSTALL_WRKSRC=	${WRKSRC}/python
 DESCR=		${.CURDIR}/pkg-descr
 PLIST=		${NONEXISTENT}
-PLIST_FILES=	%%PYTHON_SITELIBDIR%%/dnet.so \
-		%%PYTHON_SITELIBDIR%%/dnet-${PORTVERSION}-py${PYTHON_VER}.egg-info
+PLIST_FILES=	${PYTHON_SITELIBDIR}/dnet.so \
+		${PYTHON_SITELIBDIR}/dnet-${PORTVERSION}-py${PYTHON_VER}.egg-info
 
 LIBDNET_SLAVE=	yes
 
-USES=		python:2.7
-USE_PYTHON=	flavors
+USE_PYTHON=	cython flavors
 CONFIGURE_ARGS=	--with-python=${PYTHON_CMD}
 
 .if defined(MAINTAINER_MODE)
@@ -26,4 +27,11 @@ regression-test: install
 	${PYTHON_CMD} ${INSTALL_WRKSRC}/test.py
 .endif
 
+post-patch:
+	${REINPLACE_CMD} 's|%%CYTHON%%|cython-${PYTHON_VER}|g' \
+		${WRKSRC}/python/Makefile.am
+
+post-install:
+	${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/dnet.so
+
 .include "${MASTERDIR}/Makefile"

net/py-libdnet/pkg-descr

@@ -5,4 +5,4 @@ manipulation, network firewalling, network interface lookup and
 manipulation, and raw IP packet and Ethernet frame transmission. It is
 intended to complement the functionality provided by pcap(3).
 
-WWW: https://code.google.com/p/libdnet/
+WWW: https://github.com/5u623l20/libdnet/