src: expose nft_ctx_clear_vars as API

This function might be useful to recycle the existing nft_ctx to use it
with different external variable definitions.

Moreover, reset ctx->num_vars to zero.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libnftables.map b/src/libnftables.map
index 46d64a38..d3a795ce 100644
--- a/src/libnftables.map
+++ b/src/libnftables.map
@@ -26,4 +26,5 @@ local: *;
 
 LIBNFTABLES_2 {
   nft_ctx_add_var;
+  nft_ctx_clear_vars;
 } LIBNFTABLES_1;