[interchange] Relax regular expression for UTF8 locale used in [convert-date] tag.

[Stefan Hornburg]

commit 9a08d2e0d9b3e3acc7f5fcc2d1b29e8a54ef208e
Author: Stefan Hornburg (Racke) <racke at linuxia.de>
Date:   Tue Mar 5 21:05:55 2013 +0100

    Relax regular expression for UTF8 locale used in [convert-date] tag.

 code/UserTag/convert_date.tag |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/code/UserTag/convert_date.tag b/code/UserTag/convert_date.tag
index 4718f81..31be272 100644
--- a/code/UserTag/convert_date.tag
+++ b/code/UserTag/convert_date.tag
@@ -77,7 +77,7 @@ sub {
 	if ($locale) {
 		$current = POSIX::setlocale(&POSIX::LC_TIME);
         if (($::Variable->{MV_UTF8} || $Global::Variable->{MV_UTF8})
-            && $locale !~ /\.utf8$/) {
+            && $locale !~ /\.utf-?8$/i) {
             POSIX::setlocale(&POSIX::LC_TIME, "$locale.utf8");
         }
         else {