Tests: fixed testing server_name with "\p{N} in named capture".

Previously, a virtual server with such configuration was not actually tested,
because another one specified with more generic regular expression comes first.
Configuration has been adjusted to use mutually exclusive regular expressions.

Author: pluknet

http_server_name.t

@@ -80,7 +80,7 @@ http {
 
     server {
         listen       127.0.0.1:8080;
-        server_name  ~^(?P<name>.+)\Q.example.com\E$;
+        server_name  ~^(?P<name>[a-z]+)\Q.example.com\E$;
 
         location / {
             add_header X-Server $server_name;