modules: update LEDE (2017-10-02)

783465d783 odhcpd: don't enable server mode on non-static lan port
c92c1894a5 odhcpd: backport fixes from master branch (FS#402, FS#524)
4b4a4af814 dnsmasq: bump to v2.78
b8357e87d7 base-files: create /etc/config/ directory
3350137bd3 sunxi: clean up modules definitions
a881323cb2 ltq-vdsl-mei: revert disable optimized firmware download
f483a35f08 curl: fix security problems
e232c6754d mbedtls: update to 2.6.0 CVE-2017-14032
37e1bd27d0 generic: drop 704-phy-no-genphy-soft-reset.patch
720b0e2e2d kernel: update 4.4 to 4.4.89
b428f45c06 ltq-vdsl-mei: disable optimized firmware download
39e5cd9556 ltq-vdsl: fix PM thread suspend and resume handling
86f0e8b091 openvpn: add "extra-certs" option
af802bc687 lantiq: fix missing otg_cap on danube platform
12a0da6315 tcpdump: noop commit to refer CVEs fixed in 4.9.2
f66c6e1d8a tcpdump: bump to 4.9.2
a131f7cb69 utils/tcpdump: Rework URLs
7f1359c14e base-files: fix wan6 interface config generation for pppoe
97ebdf93a3 ipq806x: Archer C2600: fix switch ports numbering
d33f7905df treewide: fix shellscript syntax errors/typos
4f162ac3ce ramips: fix hg255d LED status support