src: Add command "replace" for rules

Modify the parser and add necessary functions to provide the command "nft
replace rule <ruleid_spec> <new_rule>"

Example of use:

	# nft list ruleset -a
	table ip filter {
		chain output {
			ip daddr 8.8.8.7 counter packets 0 bytes 0 # handle 3
		}
	}
	# nft replace rule filter output handle 3 ip daddr 8.8.8.8 counter
	# nft list ruleset -a
	table ip filter {
		chain output {
			ip daddr 8.8.8.8 counter packets 0 bytes 0 # handle 3
		}
	}

Signed-off-by: Carlos Falgueras García <carlosfg@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/scanner.l b/src/scanner.l
index b827489a..1a9f43f8 100644
--- a/src/scanner.l
+++ b/src/scanner.l
@@ -259,6 +259,7 @@ addrstring	({macaddr}|{ip4addr}|{ip6addr})
 "netdev"		{ return NETDEV; }
 
 "add"			{ return ADD; }
+"replace"		{ return REPLACE; }
 "update"		{ return UPDATE; }
 "create"		{ return CREATE; }
 "insert"		{ return INSERT; }