[doc] links http -> https

sys/eepreg: EEPROM registration support (version 2)

doc/boards: move jiminy from wiki to RIOT repo

tests/heatshrink: move from unittests to regular test

This moves tests for the heatshrink package from unittests to a regular
test, which should help to decrease binary size of unittests.

cpu/esp8266: cpu frequency settings feature added

net/nanocoap: rename variable name 'class'

'class' is keyword in c++ and leads to conflicts

boards/wsn430*: fix doxygen grouping

ethos: Add drop frame case to recv function

tests/libcose: Move from unittests to regular test

CORD: enable THREAD_CREATE_STACKTEST for threads

pkg/littlefs: bump version to v1.6.2

sys/ecc: add repetition code

lorabox: add port to flasher parameters

sys/ecc: add golay(24,12) half rate code

pkg/semtech-loramac: Reduce timeout in timer

pkg/nimble: use STACKTEST flag for controller thread

tests/lwip_sock_{i,ud}p: correctly get array address

tests/lwip_sock_*: Stop main thread from overflowing

 nrf5x_common: gpio: fix port 1 functionality 

This adds the port parameter to the stm32loader flash script. This was
necessary to allow flashing on macOS X where the default port is not
autodetected correctly and needs to be specified, e.g. by running:

    BOARD=lobaro-lorabox PORT=/dev/tty.SLAB_USBtoUART \
    make -C examples/lorawan flash term`

net/rdcli*: restructure and rename RD related modules