test1511: consistently terminate headers with CRLF

tests/data/test1511

@@ -10,7 +10,7 @@ HTTP
 <data>
 HTTP/1.1 200
 Date: Thu, 09 Nov 2010 14:49:00 GMT
-Server: test-server/fakem
+Server: test-server/fakem
 Last-Modified: Mon, 22 Apr 2013 17:45:05 GMT
 Content-Type: text/html
 Content-Length: 12
@@ -22,7 +22,7 @@ Hello World
 <datacheck>
 HTTP/1.1 200
 Date: Thu, 09 Nov 2010 14:49:00 GMT
-Server: test-server/fakem
+Server: test-server/fakem
 Last-Modified: Mon, 22 Apr 2013 17:45:05 GMT
 Content-Type: text/html
 Content-Length: 12
@@ -30,7 +30,7 @@ Connection: close
 
 HTTP/1.1 200
 Date: Thu, 09 Nov 2010 14:49:00 GMT
-Server: test-server/fakem
+Server: test-server/fakem
 Last-Modified: Mon, 22 Apr 2013 17:45:05 GMT
 Content-Type: text/html
 Content-Length: 12