periph/rtc: move init from auto_init to periph_init

examples/pkgs: rename modules with duplicate names

dist/tools/pr_check: fix regex pattern to recognize any SHA

Root directory of libfixmath and u8g2 where the same as another directory.

examples/default: remove usage of config module

cpu/sam0: share GPIO configuration

makefiles: docker: make docker call non-interactive

cpu, sam3: fix periph/dac poweron

prevents "the input device is not a TTY"

cpu, atmega_common: add periph/adc

ld: refactor sam0 ldscripts

drivers: added soft SPI driver

cpu/stm32_common: consider timer multiplier for PWM

posix: move time functions to their own module

tests/libfixmath_*: migrate to testrunner

drivers/rgbled: fix PWM resolution

dist: testrunner: terminate gracefully on ProcessLookupError

testrunner: show information about failed line (even without traceback)

Revert "shell/ccnl: remove use of ccnl_wait_for chunk()"

tests/struct_tm_utility: migrate to testrunner

tests/ssp: migrate to testrunner