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
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
Optimise function calls
Use array functions instead of loops
findInstalledlangs is currently called by the construct - as this is called frequently, maximise its efficiency
User no longer can select on or pro: If remapping is enabled and rules are set, then must use pro or phones will not find files
Otherwise is Off (flat directory)
Create required directory structure
Check if mapping support is enabled
Check if mapping rules are defined
Change options available based on above
Create index.cnf and sccpManagerRewrite.rules
