Merge branch 'bugfix/btdm_security_vulnerability_on_encryption_key_size_v3.1' into 'release/v3.1'

components/bt: set the minimum encryption key size to be 7 octects for BR/EDR link

See merge request espressif/esp-idf!5874
This commit is contained in:
Jiang Jiang Jian
2019-08-26 18:01:51 +08:00