ENH: Do not build tests by default

Source/CTest/Curl/CMakeLists.txt

@@ -379,7 +379,7 @@ ADD_LIBRARY(Curl STATIC ${libCurl_SRCS})
 
 TARGET_LINK_LIBRARIES(Curl ${CURL_LIBS})
 
-OPTION(CURL_TESTING "Do libCurl testing" ON)
+OPTION(CURL_TESTING "Do libCurl testing" OFF)
 IF(CURL_TESTING)
   SUBDIRS(Testing)
 ENDIF(CURL_TESTING)