lib/pktanon: add <unistd.h> for modern compilers

USE_DOS2UNIX had to be set in order to apply the patch.

Approved by:	portmgr (bapt, implicit)

net/pktanon/Makefile

@@ -12,6 +12,7 @@ COMMENT=	Network trace anonymizer
 LIB_DEPENDS=	boost_regex:${PORTSDIR}/devel/boost-libs \
 		xerces-c.3:${PORTSDIR}/textproc/xerces-c3
 
+USE_DOS2UNIX=	yes
 GNU_CONFIGURE=	yes
 CPPFLAGS+=	-I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib -lboost_system

net/pktanon/files/patch-src_Timer.cpp

@@ -0,0 +1,10 @@
+--- src/Timer.cpp.orig	2013-10-01 17:57:00.000000000 +0000
++++ src/Timer.cpp
+@@ -16,6 +16,7 @@
+ // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ //
+ 
++#include <unistd.h>
+ #include "Timer.h"
+ 
+ Timer::Timer ()