HTTPS test fixes and improvements:

always skip tests if libcurl do not support HTTPS (instead of failing)
return 99 in case of global errors (MHD-unrelated)
print error result if test if failed
fixed ignored result of epoll test in test_https_get_select
allow compilation by C89 compiler

src/testcurl/https/test_https_multi_daemon.c

@@ -96,6 +96,7 @@ main (int argc, char *const *argv)
 {
   unsigned int errorCount = 0;
   FILE *cert;
+  const char *aes256_sha = "AES256-SHA";
 
   gcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0);
 #ifdef GCRYCTL_INITIALIZATION_FINISHED
@@ -105,20 +106,26 @@ main (int argc, char *const *argv)
     {
       fprintf (stderr, "Error (code: %u). l:%d f:%s\n", errorCount, __LINE__,
                __FUNCTION__);
-      return -1;
+      return 99;
+    }
+  if (NULL == curl_version_info (CURLVERSION_NOW)->ssl_version)
+    {
+      fprintf (stderr, "Curl does not support SSL.  Cannot run the test.\n");
+      curl_global_cleanup ();
+      return 77;
     }
   if ((cert = setup_ca_cert ()) == NULL)
     {
       fprintf (stderr, MHD_E_TEST_FILE_CREAT);
-      return -1;
+      curl_global_cleanup ();
+      return 99;
     }
 
-  const char *aes256_sha = "AES256-SHA";
   if (curl_uses_nss_ssl() == 0)
     {
       aes256_sha = "rsa_aes_256_sha";
     }
-  
+
   errorCount +=
     test_concurent_daemon_pair (NULL, aes256_sha, CURL_SSLVERSION_TLSv1);
 
@@ -130,5 +137,5 @@ main (int argc, char *const *argv)
     fprintf (stderr,
 	     "Failed to remove `%s'\n",
 	     ca_cert_file_name);
-  return errorCount != 0;
+  return errorCount != 0 ? 1 : 0;
 }