Change logging API from push to pull

[sylane]

The file grisp_connect_log_server.erl was renamed grisp_connect_log.erl and a lot of the code remained unchanged, but git is not recognising the rename because there is too much differences (all the gen_server stuff got removed).

[ziopio]

Looks Good

[ziopio]

You should have left the WIP commit and just added another one, now I am using the compare buttons to know what changed from my partial review.
It is cool that Github helps with this but in this case @sylane there was no need to rewrite the commit.
;)

[sylane]

You should have left the WIP commit and just added another one, now I am using the compare buttons to know what changed from my partial review. It is cool that Github helps with this but in this case @sylane there was no need to rewrite the commit. ;)

I rebased on top of the changes of the exponential backoff PR, so there is not much I could do, could I ?
This is the problem with multiple inter-dependent PR...

[ziopio]

Maybe I got confused with another PR, yeah do not worry.