mariemC

pkg/mbedtls: add TLS support for LWIP

2

### Contribution description - The client node connects to openssl server and sends an encrypted message after a handshake and key exchange. - mbedtls package is added. - lwip package...

### Contribution description This PR fixes the issue with rtt reset after a node hibernation You may notice an issue when using the **rtt_rtc** module in any RIOT OS example....

sys/auto_init: control the wdt thread

5

### Contribution description This enables the user to stop the watchdog thread at any time, the use case I had is that due to a power glitch the board hangs...