Fix Issue #53
Consolidate forms to facilitate maintenance, reduce code, and apply changes to SIP handling introduce for sccp
Delete form.addsdevice.php
Delete form.sbuttons.php
Delete sipconfigs class and move db functions to dbinterface class, and other function to helperfunctions
create new field type for SIP line
update 9951 buttons count in installer
simplify segregation of sip and sccp requests
keepalive was on 2 pages, so the value was being written then overwritten
Improved handling of customise and restore javascript to ensure that if the option was subsequently unselected, the original value was retained
Remove unused group from server.settings.php
Correct testing for use of system defaults
Correct application of system defaults
ToDo:Numeric values are not being saved, or do not revert to defaults when button clicked
dndFeature setting was not saved
check for existence of chan-sccp flags
add helper to list chan-sccp flags
fix version compatibility check
update version to 14.3.0.19
Previously ignored sccp extensions in freepbx devices and so created 'orphans'. Now create rows for sccpline for devices that already exist as sccp extensions in devices.
Remove dbug code
Mariadb does not accept _prefixed fields by spec, and these columns may give future issues. Migrate all fields in installer to remove this prefix (without data loss) and:
Create new view sccplineconfig for chan-sccp where only accepted fields are shown
Update sccpdeviceconfig to only show accepted fields
Update extconfigs.conf to use sccplineconfig
Remove references to _ prefixed fields
Add choice of default line on add device
Partially fix buttoncount (will not work if default device is selected)
Correct database save logic for buttons - triggers should be OK but more verification needed
Fix various save issues where defaults not correctly set
Delete default buttons when deleting line to avoid orphans
Get country files with locales
WIP incompatibility between provision, its rewrite rules and the file structure
WIP - need to clean up get files from provisioner
Add device to extensions page - permits to see unassigned lines and shared lines easily
Reformat status to centred
change 'replace' in sccp class to only 'insert on duplicate key' (UPSET equivalent)
Change request in phoneGrid to left join to show all lines, even unassigned to a device
