Add a default option to use utf8proc for Unicode normalization,

case-folding, and other operations.

It is substantially better and more up-to-date than the libc functions
providing the same features.

PR:		234822
Submitted by:	David O'Rourke

sysutils/tmux/Makefile

@@ -3,6 +3,7 @@
 
 PORTNAME=	tmux
 PORTVERSION=	2.8
+PORTREVISION=	1
 CATEGORIES=	sysutils
 MASTER_SITES=	https://github.com/tmux/tmux/releases/download/${PORTVERSION}/
 DISTFILES=	${DISTNAME}${EXTRACT_SUFX}
@@ -30,10 +31,12 @@ PLIST_FILES=	bin/tmux \
 PORTDOCS=	CHANGES README TODO
 PORTEXAMPLES=	*
 
-OPTIONS_DEFINE=	DOCS EXAMPLES LIBEVENT_STATIC BACKSPACE
+OPTIONS_DEFINE=	DOCS EXAMPLES LIBEVENT_STATIC BACKSPACE UTF8PROC
+OPTIONS_DEFAULT=	UTF8PROC
 
 LIBEVENT_STATIC_DESC=	Build with static libevent
 BACKSPACE_DESC=	Build with tty/keys patch
+UTF8PROC_DESC=	Build with utf8proc support
 
 BACKSPACE_EXTRA_PATCHES=	${PATCHDIR}/extra-patch-tty-keys.c
 
@@ -41,6 +44,9 @@ LIBEVENT_STATIC_LIB_DEPENDS_OFF=	libevent.so:devel/libevent
 LIBEVENT_STATIC_BUILD_DEPENDS=	${LOCALBASE}/lib/libevent.a:devel/libevent
 LIBEVENT_STATIC_VARS=	LESTATIC=${LOCALBASE}/lib/libevent.a
 
+UTF8PROC_CONFIGURE_ENABLE=	utf8proc
+UTF8PROC_LIB_DEPENDS=	libutf8proc.so:textproc/utf8proc
+
 post-patch:
 	@${REINPLACE_CMD} -e 's|/etc/tmux.conf|${PREFIX}/etc/tmux.conf|g' ${WRKSRC}/CHANGES \
 		${WRKSRC}/tmux.h