* added tr069 enable and periodic_inform_enable vars to config templates add variable on dp750 template for enabling tr-069 provisioning.
* add vars to grandstream app default settings
* add if condition to use the variables.
* Update app_config.php
* Fix sort on call broadcast display
* Grandstream Template Updates
For grp/gxp, added settings for intercom auto answer and multicast paging
For gxw42xx - Added off-hook auto-dial settings to all lines
For wp820 - Fixed incorrect P-codes and added setings for wifi roaming
Contributed new template for gxv3480
Add grandstream_missed_call_log, grandstream_missed_call_notification, grandstream_missed_call_backlight, grandstream_firmware_upgrade_protocol, grandstream_onhook_dial_barging, grandstream_transfer_mode_via_vpk, grandstream_enable_call_features.
Add condition on grandstream_distinctive_ringtone_name_1, and grandstream_distinctive_ringtone_name_2.
Update Connection request user/pw to work better with GDMS.
On grandstream_wallpaper_url, use current setting name on GRP2613
* Support for Disabling Non-configured ports on GXW42XX gateways
When patching in an ATA at facilities like residential facilities, we don't want dial tone on un-configured ports. This makes it so that the device will disable ports that have no user id configured so they don't provide dial tone. The behavior can be reversed by setting grandstream_fxs_enabled to 1 in the settings.
There was an illogical if/else statement that the "else" condition would always set a null value, so it didn't really matter. Re-wrote it to properly filter if the transport is set to dns srv and not affix the SIP Port to the server address.
Fix config URL so that the phones don't get an invalid URL when $domain_name is unset. They would previously receive `/app/provision` with no domain/ip included, which makes the phone unable to provision again once they have been added to the Devices page without manually re-setting the config URL or factory defaulting the device.
The alternative solution is that the PHP code could always ensure that the $domain_name variable is set even if the device doesn't exist. My suggestion is to see if it can be set to the same domain/IP as the original provision request from this unconfigured device
* Added the ability to pick the SIP account for the first two slots on each handset
* Revert to clean base
* Configurable firmware versions for Grandstream Devices
* Cleaned up duplicate P codes in gxv3504 prov, and spacing elsewhere
Updated or added configurable firmware versions to the remaining Grandstream configs
* Documented how to use the firmware version feature
* Formatting fix in Readme