Snom enhancements

Hello,
This PR brings several improvements to the Yealink plugin :

It properly adjusts account details display, replacing useless SIP user ID with the extension number.
It disable local phonebook if remote phonebook is available (so that we're sure it's properly used).
It adjusts retry_after_failed_register, making devices to retry faster on their first retries, as some SIP-TLS configured devices systematically wait 2 minutes before registering. Adjusting retry_after_failed_register like in this PR solves this issue.
It ajusts provisioning_order, allowing to provision Snom devices manually. This modification does not break DHCP provisionning, it simply allows devices to provision manually if they do not receive any provisioning option from DHCP.
It enables SIP-TLS and SRTP on a per-line basis.

Thank you 👍
Before :

After :

Reviewed-by: Alexandre Fournier <None>

Gigaset N510 enhancements

Hello,
This PR enhances Gigaset N510 plugin.
First, it enables firmware auto-update, thanks to properly formatted links provided by Gigaset.
As found in the documentation :
https://teamwork.gigaset.com/gigawiki/display/GPPPO/Direct+link+to+Firmware+file
While here, also update to last firmware version.
https://teamwork.gigaset.com/gigawiki/display/GPPPO/Firmware+N510+IP+PRO
It also properly assign each DECT to its SIP line only.
By default, on N510, all DECT ring / receive calls for all the 6 configured SIP accounts.
And all DECT make outgoing calls from the first configured SIP account.
Which does not make sense...
This PR then properly assign each DECT to its proper SIP account : first DECT to first SIP account, second DECT to second SIP account etc..
Which is then the expected behaviour...
Thank you 👍

Reviewed-by: Alexandre Fournier <None>

Add Mitel 69xx in version 5.1.0

Reviewed-by: Alexandre Fournier <None>

WAZO-2562 - Disable G722 variation for T58 and T58W

Reviewed-by: Alexandre Fournier <None>

firmware version correction

Reviewed-by: Alexandre Fournier <None>

[WAZO-2759] fanvil: fix wrong common files for 2.3

Reviewed-by: Pascal Cadotte Michaud <None>

optimize 68xx template

Reviewed-by: Alexandre Fournier <None>

WAZO-2554: Alcatel-Lucent MX series

Reviewed-by: Pascal Cadotte Michaud <None>

Why: necessary to update the firmware on previous versions.