editors/beav: Unbreak after staging support attempt

After recent commits, beav was broken on every platform for a couple
of reasons.  Primarily the Makefile had a bug in it, so it was
unexecutable.  Secondly, the "man page fix" was done in ${STAGEDIR}
using sed -i, causing the resultant .bak file to also be installed, or
at least orphaned.  Poudriere caught that issue.

While here, add DragonFly support.

editors/beav/Makefile

@@ -20,12 +20,14 @@ WRKSRC=		${WRKDIR}/${PORTNAME}-${PORTVERSION:R:S/.//}
 ALL_TARGET=	beav
 MAKE_ARGS=	CC="${CC}" CFLAGS="${CFLAGS} -DUNIX -DBSD -DNOPROTO"
 
+post-patch:
+	@${REINPLACE_CMD} -e 's|(OFILES):|$$(OFILES):|' ${WRKSRC}/Makefile
+	@${REINPLACE_CMD} -e 's|%%PREFIX%%|${PREFIX}|g' ${WRKSRC}/beav.1
+
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/beav ${STAGEDIR}${PREFIX}/bin/beav
 	${INSTALL_MAN} ${WRKSRC}/beav.1 ${STAGEDIR}${PREFIX}/man/man1/beav.1
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/beav140.txt ${STAGEDIR}${DOCSDIR}/beav.txt
-	@${REINPLACE_CMD} -e 's|%%PREFIX%%|${PREFIX}|g' \
-	    ${STAGEDIR}${PREFIX}/man/man1/beav.1
 
 .include <bsd.port.mk>

editors/beav/files/patch-termio.c

@@ -5,7 +5,7 @@
  #ifdef UNIX			/* System V */
 
 +#if defined(__GLIBC__) || \
-+    defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
++    defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
 +#define TERMIOS 1
 +#endif
 +