sysutils/grub2: Fix wrong lz4 endianness and general port cleanup

Due to lack of inclusion of <sys/endian.h>, the lz4 code incorrectly
assumes a big-endian system.  The result issues manifest with errors like,
"error: no such device: <pool id>." and "lz3 decompression failed" at the
grub prompt.  Modify existing patch to add <sys/endian.h>.

While here, simplify the port with OPTIONS_SUB framework and fix the
manpage stuff on the options which apparently has been broken since
this unmaintained port was staged.

PR:		192066
Submitted by:	Andrey Zholos

sysutils/grub2/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	grub2
 PORTVERSION=	2.00
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	sysutils
 MASTER_SITES=	GNU/grub
 DISTNAME=	grub-${PORTVERSION}
@@ -18,12 +18,11 @@ BUILD_DEPENDS=	${LOCALBASE}/bin/flex:${PORTSDIR}/textproc/flex \
 
 CONFLICTS=	grub-0*
 SSP_UNSAFE=	yes
-USE_XZ=		yes
 USE_GCC=	yes
 USE_AUTOTOOLS=	automake aclocal autoconf
 ACLOCAL_ARGS=	-Im4
 GNU_CONFIGURE=	yes
-USES=		bison gettext gmake
+USES=		bison gettext gmake tar:xz
 ONLY_FOR_ARCHS=	i386 amd64
 INFO=		grub grub-dev
 MAKE_JOBS_UNSAFE=	yes
@@ -33,44 +32,31 @@ CONFIGURE_ENV=	CPP="${CC} -E" \
 		LEX=${LOCALBASE}/bin/flex
 
 OPTIONS_DEFINE=	MKFONT FUSE
+OPTIONS_SUB=	yes
 MKFONT_DESC=	Build grub-mkfont (require freetype2)
 FUSE_DESC=	Build grub-mount (require FUSE)
 
+MKFONT_CONFIGURE_ENABLE=	grub-mkfont
+MKFONT_LIB_DEPENDS=		libfreetype.so:${PORTSDIR}/print/freetype2
+MKFONT_BUILD_DEPENDS=		${LOCALBASE}/lib/X11/fonts/dejavu/DejaVuSans.ttf:${PORTSDIR}/x11-fonts/dejavu
+
+FUSE_CONFIGURE_ENABLE=		grub-mount
+FUSE_LIB_DEPENDS=		libfuse.so:${PORTSDIR}/sysutils/fusefs-libs
+
 .include <bsd.port.pre.mk>
 
-.if ${ARCH} != "amd64"
-EFIEMU=		"@comment "
-.endif
-
-PLIST_SUB+=	EFIEMU=${EFIEMU}
-
-.if ${PORT_OPTIONS:MMKFONT}
-LIB_DEPENDS+=	libfreetype.so:${PORTSDIR}/print/freetype2
-BUILD_DEPENDS+=	${LOCALBASE}/lib/X11/fonts/dejavu/DejaVuSans.ttf:${PORTSDIR}/x11-fonts/dejavu
-MAN1+=		grub-mkfont.1
-CONFIGURE_ARGS+=	--enable-grub-mkfont
+.if ${ARCH} != amd64
+PLIST_SUB+=	EFIEMU="@comment "
 .else
-CONFIGURE_ARGS+=	--disable-grub-mkfont
-MKFONT=		"@comment "
+PLIST_SUB+=	EFIEMU=""
 .endif
 
-PLIST_SUB+=	MKFONT=${MKFONT}
-
-.if ${PORT_OPTIONS:MFUSE}
-LIB_DEPENDS+=	libfuse.so:${PORTSDIR}/sysutils/fusefs-libs
-CONFIGURE_ARGS+=	--enable-grub-mount
-.else
-CONFIGURE_ARGS+=	--disable-grub-mount
-FUSE=		"@comment "
-.endif
-
-PLIST_SUB+=	FUSE=${FUSE}
-
 post-patch:
 	@${LN} -s ${LOCALBASE}/lib/X11/fonts/dejavu/DejaVuSans.ttf ${WRKSRC}
 	@${TOUCH} -t 200001010000 ${WRKSRC}/Makefile.util.def
 
 post-configure:
-	@${LN} -sfh /usr/include/machine /usr/include/sys /usr/include/x86 ${WRKSRC}/grub-core
+	@${LN} -sfh /usr/include/machine /usr/include/sys /usr/include/x86 \
+		${WRKSRC}/grub-core
 
 .include <bsd.port.post.mk>

sysutils/grub2/files/patch-grub-2.00-zfs-feature-flag-support

@@ -395,7 +395,7 @@ new file mode 100644
 index 0000000..ff85a77
 --- /dev/null
 +++ grub-core/fs/zfs/zfs_lz4.c
-@@ -0,0 +1,317 @@
+@@ -0,0 +1,318 @@
 +/*
 + * LZ4 - Fast LZ compression algorithm
 + * Header File
@@ -430,6 +430,7 @@ index 0000000..ff85a77
 + * - LZ4 source repository : http://code.google.com/p/lz4/
 + */
 +
++#include <sys/endian.h>
 +#include <grub/err.h>
 +#include <grub/mm.h>
 +#include <grub/misc.h>

sysutils/grub2/pkg-plist

@@ -1,6 +1,7 @@
 %%FUSE%%bin/grub-mount
-%%FUSE%%man/man1/grub-mount.1
+%%FUSE%%man/man1/grub-mount.1.gz
 %%MKFONT%%bin/grub-mkfont
+%%MKFONT%%man/man1/grub-mkfont.1.gz
 %%MKFONT%%share/grub/themes/starfield/dejavu_10.pf2
 %%MKFONT%%share/grub/themes/starfield/dejavu_12.pf2
 %%MKFONT%%share/grub/themes/starfield/dejavu_bold_14.pf2