Fix welcome_fr.mkd to use proper French

Julien Kirch

2014-04-22 c90be0750bff761eb2f74bc16179d1f87304dfa4

 src/main/java/com/gitblit/utils/StringUtils.java

@@ -642,7 +642,7 @@
            // ignore unsupported charsets

         }

      }

      if (value.startsWith("\uFEFF")) {

      if (value != null && value.startsWith("\uFEFF")) {

         // strip UTF-8 BOM

            return value.substring(1);

        }