shells/zsh: add completion for mdo(1)

shells/zsh/Makefile

 PORTNAME=	zsh
 DISTVERSION=	5.9
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	shells
 MASTER_SITES=	https://www.zsh.org/pub/ \
 		SF \
@@ -107,6 +107,8 @@ post-build:
 		${WRKSRC}/Doc/zshall.1)
 
 post-install:
+	${INSTALL_DATA} ${FILESDIR}/_mdo \
+		${STAGEDIR}/${DATADIR}/${ZSH_VER}/functions/Completion/Unix/
 	${MKDIR} ${STAGEDIR}${DATADIR}/site-functions
 	${LN} -f ${STAGEDIR}${PREFIX}/bin/zsh ${STAGEDIR}${PREFIX}/bin/rzsh
 # Precompile completions and functions

shells/zsh/files/_mdo

+#compdef mdo
+
+local environ e cmd cpp
+local -a _comp_priv_prefix
+local -A opt_args
+
+zstyle -a ":completion:${curcontext}:" environ environ
+
+for e in "${environ[@]}"
+do local -x "$e"
+done
+
+cmd="$words[1]"
+cpp='_comp_priv_prefix=( $cmd -n ${(kv)opt_args[(I)-u]} )'
+_arguments -s -S -A '-*' : \
+  '-u+[run command as specified user]: :_users' \
+  '-i[keep the calling user]' \
+  "*:: :{ $cpp; _normal }"

shells/zsh/pkg-plist

@@ -627,6 +627,7 @@ bin/zsh-%%ZSH_VER%%
 %%DATADIR%%/%%ZSH_VER%%/functions/Completion/Unix/_make
 %%DATADIR%%/%%ZSH_VER%%/functions/Completion/Unix/_man
 %%DATADIR%%/%%ZSH_VER%%/functions/Completion/Unix/_md5sum
+%%DATADIR%%/%%ZSH_VER%%/functions/Completion/Unix/_mdo
 %%DATADIR%%/%%ZSH_VER%%/functions/Completion/Unix/_mencal
 %%DATADIR%%/%%ZSH_VER%%/functions/Completion/Unix/_mh
 %%DATADIR%%/%%ZSH_VER%%/functions/Completion/Unix/_mime_types