Adding syntax colouring for nftables.

Original file by Arturo Borrero Gonzalez.
This addresses Debian bug #805288.


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5465 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2015-12-02  Arturo Borrero Gonzalez  <arturo.borrero.glez@gmail.com>
+	* doc/syntax/nftables.nanorc: New file; syntax colouring for nftables.
+	This addresses Debian bug #805288.
+
 2015-12-01  Benno Schulenberg  <bensberg@justemail.net>
 	* src/files.c (do_insertfile): Mark the buffer as mofified only when
 	actually something was inserted.  This fixes Savannah bug #45409.

doc/syntax/nftables.nanorc

+## Here is an example for nftables.
+
+syntax "nftables" "\.(nft|nftables)$"
+header "^#!.*(nft|nftables)"
+
+# Objects and operations
+color green "\<(chain|hook|policy|priority|ruleset|set|table|type|v?map)\>"
+color green "\<(define|include)\>"
+color red "\<(add|delete|flush|insert|remove|replace)\>"
+
+# Families
+color yellow "\<(arp|bridge|inet|ip6?)\>"
+
+# Terminal statements
+color red "\<(drop|reject)\>"
+color brightblue "\<(accept|continue|(d|s)nat|goto|jump|masquerade|return)\>"
+
+# Comments
+color cyan "(^|[[:space:]])#.*$"
+
+# Trailing whitespace
+color ,green "[[:space:]]+$"
+
+# Strings and others
+color yellow ""(\\.|[^"])*"" "'(\\.|[^'])*'"
+color green "[{}():;|`$<>!=&\\]" "(\]|\[)"
+
+# Basic variable names
+color brightred "\$[[:alpha:]_][[:alnum:]_.]*"