Bka duplicate connections

Few cleanups and fix for Bug #11709

@chhitz I am not sure how vdms relate to this code.

Added 1 commit:

• 3be42d98 - use strdsuid instead of dsuid_to_string

Review comments addressed

Added 1 commit:

• e5e52ac2 - fix missing mutex_unlock when connection duplicate is found

can you make the 'simple' patches a separate MR? so we can get rid of those?

!27 (merged)

Added 4 commits:

• 8750e66b - 1 commit from branch ds485-stack:master
• 4671569c - Make sure that only one connections to the same ds485d is active
• 6ea742ca - use strdsuid instead of dsuid_to_string
• 1140ee9c - fix missing mutex_unlock when connection duplicate is found

otherwise looks good

Added 1 commit:

• a58326a8 - Make sure that only one connections to the same ds485d is active

Duplicate connection is logged only once as notice. All commits squashed together.

mentioned in commit 1dd9e1ba

Status changed to merged