Fix selection of system-wide CA store

--- dpi/https.c
+++ dpi/https.c
@@ -169,7 +169,7 @@ static void yes_ssl_support(void)
    /*FIXME - provide for sysconfdir variables and such*/
    if (exit_error == 0){
       if (SSL_CTX_load_verify_locations(
-         ssl_context, NULL, "/etc/ssl/certs/" ) == 0){
+         ssl_context, "/usr/share/ca-certificates/ca-bundle.crt", NULL ) == 0){
          MSG("Error opening system x509 certificate location\n");
          exit_error = 1;
       }