[MINOR] checks: make the HTTP check code add the CRLF itself

Currently we cannot easily add headers nor anything to HTTP checks
because the requests are pre-formatted with the last CRLF. Make the
check code add the CRLF itself so that we can later add useful info.
diff --git a/include/common/defaults.h b/include/common/defaults.h
index bdc4176..7746a98 100644
--- a/include/common/defaults.h
+++ b/include/common/defaults.h
@@ -111,7 +111,7 @@
 #define	DEF_CHKINTR     2000
 #define DEF_FALLTIME    3
 #define DEF_RISETIME    2
-#define DEF_CHECK_REQ   "OPTIONS / HTTP/1.0\r\n\r\n"
+#define DEF_CHECK_REQ   "OPTIONS / HTTP/1.0\r\n"
 #define DEF_SMTP_CHECK_REQ   "HELO localhost\r\n"
 
 #define DEF_HANA_ONERR		HANA_ONERR_FAILCHK