test1517: replace custom check with feature check

tests/data/test1517

@@ -43,18 +43,17 @@ http
 <tool>
 lib%TESTNUMBER
 </tool>
-# precheck is a command line to run before the test, to see if we can execute
-# the test or not
-<precheck>
-%LIBTESTS lib%TESTNUMBER check
-</precheck>
-
 <name>
 HTTP POST, server responds before completed send
 </name>
 <command>
 http://%HOSTIP:%HTTPPORT/%TESTNUMBER
 </command>
+<features>
+# Windows TCP does not deliver response data but reports CONNABORTED
+!cygwin
+!win32
+</features>
 </client>
 
 #

tests/libtest/lib1517.c

@@ -61,17 +61,6 @@ static CURLcode test_lib1517(const char *URL)
 
   struct t1517_WriteThis pooh;
 
-  if(!strcmp(URL, "check")) {
-#if (defined(_WIN32) || defined(__CYGWIN__))
-    curl_mprintf("Windows TCP does not deliver response data but reports "
-                 "CONNABORTED\n");
-    return TEST_ERR_FAILURE; /* skip since it fails on Windows without
-                                workaround */
-#else
-    return CURLE_OK; /* sure, run this! */
-#endif
-  }
-
   pooh.readptr = testdata;
   pooh.sizeleft = strlen(testdata);