net/rsync: Fix distinfo file generation

Fix a long standing issue in distinfo file generation caused
by the way patch distfiles are handled.

In the previous code, every time a patch was activated, it adds its own
entry into the DISTFILES variable, but because all the patches comes
from the same distfile, we ended with duplicate entries in the list.
As a consequence, the make makesum target generates a distinfo file with
duplicate entries, causing issues to the builder who tries to fetch and untar
the same file in paralel.

Now we add the distfile to the list if one of the options is activated,
avoiding duplication in the DISTFILES list.

This fix has no impact on the generated package, so no PORTREVISION
bump is required.

Author: rosorio

net/rsync/Makefile

@@ -58,26 +58,25 @@ ZLIB_BASE_DESC=	Use zlib from base instead of bundled one
 PTS_DESC=	Functionality provided by third party patches
 RENAMED_DESC=	Add support for renamed file detection
 
-FLAGS_DISTFILES=	${PORTNAME}-patches-${DISTVERSION}${EXTRACT_SUFX}
 FLAGS_EXTRA_PATCHES=	${WRKSRC}/patches/fileflags.diff \
 			${FILESDIR}/extrapatch-main.c
 
-ICONV_DISTFILES=	${PORTNAME}-patches-${DISTVERSION}${EXTRACT_SUFX}
 ICONV_USES=		iconv:translit
 ICONV_CONFIGURE_ENABLE=	iconv iconv-open
 
 POPT_PORT_LIB_DEPENDS=		libpopt.so:devel/popt
 POPT_PORT_CONFIGURE_OFF=	--with-included-popt
 
-RENAMED_DISTFILES=	${PORTNAME}-patches-${DISTVERSION}${EXTRACT_SUFX}
 RENAMED_EXTRA_PATCHES=	${WRKSRC}/patches/detect-renamed.diff
 
 SSH_CONFIGURE_ON=	--with-rsh=ssh
 SSH_CONFIGURE_OFF=	--with-rsh=rsh
 
 ZLIB_BASE_CONFIGURE_ON=	--with-included-zlib=no
 
-.if make(makesum)
+.include <bsd.port.options.mk>
+
+.if make(makesum) || ${PORT_OPTIONS:MRENAMED} || ${PORT_OPTIONS:MICONV} || ${PORT_OPTIONS:MRENAMED}
 DISTFILES+=	${PORTNAME}-patches-${DISTVERSION}${EXTRACT_SUFX}
 .endif