tests/pkd: Check OpenSSH version only once

Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

tests/pkd/pkd_util.c

@@ -45,10 +45,14 @@ static int is_openssh_client_new_enough(void) {
     FILE *fp = NULL;
     char version[1024] = { 0 };
 
-    int version_ok = 0;
+    static int version_ok = 0;
     unsigned long int major = 0;
     char *tmp = NULL;
 
+    if (version_ok) {
+        return version_ok;
+    }
+
     fp = popen("ssh -V 2>&1", "r");
     if (fp == NULL) {
         fprintf(stderr, "failed to get OpenSSH client version\n");