editors/mg: add -static slave installed as /rescue/mg

When recovering from a broken rtld(1) one may want a visual editor that
feels like Emacs. ee(1) isn't under /rescue, and its Emacs keys support
lacks even C-x C-c (save-buffers-kill-emacs).

editors/Makefile

@@ -192,6 +192,7 @@
     SUBDIR += linux-sublime3
     SUBDIR += madedit
     SUBDIR += mg
+    SUBDIR += mg-static
     SUBDIR += micro
     SUBDIR += mined
     SUBDIR += mle

editors/mg-static/Makefile

@@ -0,0 +1,19 @@
+# $FreeBSD$
+
+PORTEPOCH=	0 # don't bump accidentally
+PKGNAMESUFFIX=	-static
+
+COMMENT=	Small, fast Emacs-like editor (rescue(8) version)
+
+MASTERDIR=	${.CURDIR}/../mg
+
+CONFIGURE_ARGS=	--enable-static
+PLIST_FILES=	/rescue/${PORTNAME}
+
+OPTIONS_EXCLUDE=DOCS
+
+do-install:
+	${MKDIR} ${STAGEDIR}${PLIST_FILES:[1]:H}
+	${INSTALL_PROGRAM} ${WRKSRC}/${PORTNAME} ${STAGEDIR}${PLIST_FILES:[1]}
+
+.include "${MASTERDIR}/Makefile"

editors/mg/Makefile

@@ -3,18 +3,18 @@
 
 PORTNAME=	mg
 PORTVERSION=	6.7
-PORTEPOCH=	1
+PORTEPOCH?=	1
 CATEGORIES=	editors
 MASTER_SITES=	https://github.com/ibara/mg/releases/download/mg-${PORTVERSION}/
 
 MAINTAINER=	ports@FreeBSD.org
-COMMENT=	Small, fast Emacs-like editor
+COMMENT?=	Small, fast Emacs-like editor
 
 LICENSE=	PD
 
 USES=		ncurses
 HAS_CONFIGURE=	yes
-PLIST_FILES=	bin/mg \
+PLIST_FILES?=	bin/mg \
 		man/man1/mg.1.gz
 PORTDOCS=	README-Mg README.md tutorial