firewall: extend ubus support, exception handling, parse fixes

firewall: extend ubus support, exception handling, parse fixes

Update to latest Git HEAD in order to import a number of fixes and other
improvements:

3d2c18a options: improve handling of negations when parsing space separated values
0e5dd73 iptables: support -i, -o, -s and -d in option extra
4cb06c7 ubus: increase ubus network interface dump timeout
e5dfc82 iptables: add exception handling
f625954 firewall3: add check_snat() function
7d3d9dc firewall3: display the section type for UBUS rules
53ef9f1 firewall3: add UBUS support for include scripts
5cd4af4 firewall3: add UBUS support for ipset sections
02d6832 firewall3: add UBUS support for forwarding sections
0a7d36d firewall3: add UBUS support for redirect sections
d44f418 firewall3: add fw3_attr_parse_name_type() function
e264c8e firewall3: replace warn_rule() by warn_section()
6039c7f firewall3: check the return value of fw3_parse_options()

Fixes FS#548, FS#806, FS#811.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>