Wi-Fi AP MAC address should be anonymized in Whisperback debugging info

An user reported that there bug reports sent by whisperback may contain non-anonymized WLAN AP Mac address. This should be considered as a sensitive information and be anonymized.

This is an extract of (manually anonymized) logs from whisperback debugging info:

[ 000.000000] wlan0: authenticate with 00:xx:xx:xx:xx:xx
[ 000.000000] wlan0: send auth to 00:xx:xx:xx:xx:xx (try 1/3)
[ 000.000000] wlan0: authenticated
[ 000.000000] wlan0: associate with 00:xx:xx:xx:xx:xx (try 1/3)
[ 000.000000] wlan0: RX AssocResp from 00:xx:xx:xx:xx:xx (capab=0x411 status=0 aid=2)

Related issues

Related to #6343

Original created by @alant on 6391 (Redmine)

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