Makefile cleanup

Details:
- Add LICENSE_FILE
- Use DISTVERSION instead of PORTVERSION
- Set the directory to install the manual in via MAKE_ENV and MANDIRS
  instead of REINPLACE_CMD during the pre-patch target.
- Bump PORTREVISION

PR:		227608
Submitted by:	0mp
Approved by:	maintainer timeout

sysutils/rw/Makefile

@@ -1,21 +1,21 @@
 # $FreeBSD$
 
 PORTNAME=	rw
-PORTVERSION=	1.0
+DISTVERSION=	1.0
+PORTREVISION=	1
 CATEGORIES=	sysutils
 MASTER_SITES=	https://sortix.org/rw/release/
-DISTNAME=	rw-portable-${PORTVERSION}
+DISTNAME=	rw-portable-${DISTVERSION}
 
 MAINTAINER=	jsmith@resonatingmedia.com
 COMMENT=	Simple replacement for dd wth standard command line flags
 
 LICENSE=	ISCL
+LICENSE_FILE=	${WRKSRC}/LICENSE
 
 PLIST_FILES=	bin/rw man/man1/rw.1.gz
 
-pre-patch:
-	@${REINPLACE_CMD} -e 's|$$(PREFIX)/share|$$(PREFIX)|' \
-	  	${WRKSRC}/Makefile
+MAKE_ENV=	MANDIR=${MANDIRS}
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/${PORTNAME}