Fix how the read mode is specified to access

The mode passed to access is an int and not a string, like in fopen.

src/sslutils/sslutils.c

@@ -519,7 +519,7 @@ ERR_load_prxyerr_strings(
 
         randfile = RAND_file_name(buffer,200);
 
-        if (randfile && access(randfile, "r") == 0)
+        if (randfile && access(randfile, R_OK) == 0)
         {
             RAND_load_file(randfile,1024L*1024L);
         }