b6a1f43075f9 base-files: fix UCI config parsing and callback handling
6734f32d91cd mtd: add build hack to reintroduce shared mtd for older releases
aaac9e82aa60 mtd: mark as nonshared to fix FS#484
0fee4906d5c0 ustream-ssl: update to latest git HEAD
f34a0756fd94 ustream-ssl: update to latest git HEAD
98b9d8a3d3fd mbedtls: Activate the session cache
88ba88e5adc4 mbedtls: update mbedtls to version 2.7.3

efb6ca189641 base-files: /lib/functions.sh: ignore errors in insert_modules
b5ba01a0d3f6 fstools: update to latest lede-17.01 branch
a9b607740273 kernel: bump kernel 4.4 to 4.4.126 for 17.01
09d95e44fc3d mbedtls: change libmbedcrypto.so soversion back to 0
4673a0bffc89 kernel: mtd: bcm47xxpart: improve handling TRX partition size

Also switch to the upstreamed version of "kernel: disable accept_ra by
default".