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