copr: backend: log files should be served as charset=utf-8

Fixes: https://pagure.io/copr/copr/issue/762

roles/copr/backend/files/lighttpd/lighttpd.conf

@@ -492,3 +492,8 @@ $HTTP["url"] !~ "^/archive/spacewalk($|/)" {
     mimetype.assign = ("" => "text/plain" )
   }
 }
+
+# https://pagure.io/copr/copr/issue/762
+$HTTP["url"] =~ "\.log$" {
+    mimetype.assign = ("" => "text/plain; charset=utf-8" )
+}

roles/copr/backend/files/lighttpd/lighttpd_dev.conf

@@ -505,6 +505,11 @@ $HTTP["url"] =~ "\.log\.gz$" {
     mimetype.assign = ("" => "text/plain" )
 }
 
+# https://pagure.io/copr/copr/issue/762
+$HTTP["url"] =~ "\.log$" {
+    mimetype.assign = ("" => "text/plain; charset=utf-8" )
+}
+
 url.redirect = ( "^/results/(.*)/(.*)/mageia-(.*)-i386(.*)" => "/results/$1/$2/mageia-$3-i586$4" )
 
 accesslog.filename = "|/usr/sbin/cronolog /var/log/lighttpd/access.log"