[PATCH] update _iconv (support Citrus version in macOS etc)

["Jun. T" <takimoto-j@xxxxxxxxxxxxxxxxx>]

macOS was using iconv from GNU libiconv, but in Sonoma it uses
iconv from the Citrus Project. This iconv does not support
the option --version, but can list the available codesets by
the option -l. Current _iconv supports this iconv only in
FreeBSD. It seems DragonFly and NetBSD also use this iconv.


diff --git a/Completion/Unix/Command/_iconv b/Completion/Unix/Command/_iconv
index bf04acfe4..fba0b9afe 100644
--- a/Completion/Unix/Command/_iconv
+++ b/Completion/Unix/Command/_iconv
@@ -63,7 +63,7 @@ else
     '1:file:_files' && return 0
 
   if [[ $state = codeset ]]; then
-    if [[ $OSTYPE = freebsd* ]]; then
+    if [[ $OSTYPE = (freebsd|dragonfly|netbsd|darwin)* ]]; then
       codeset=( $(_call_program codesets $words[1] -l) )
     elif [[ -f /usr/lib/iconv/iconv_data ]]; then  # IRIX & Solaris
       codeset=( ${${(f)"$(</usr/lib/iconv/iconv_data)"}%%[[:blank:]]*} )