change alerting system to use JSON instead of php serialized arrays


git-svn-id: http://observium.org/svn/observer/trunk@4411 61d68cd4-352d-0410-923a-c4978735b2b8
per-port one-time detection of 32/64-bit counters


git-svn-id: http://observium.org/svn/observer/trunk@4412 61d68cd4-352d-0410-923a-c4978735b2b8
updates to alerting pages, honour port_64bit in billing. split some alert_check code into a function.


git-svn-id: http://observium.org/svn/observer/trunk@4413 61d68cd4-352d-0410-923a-c4978735b2b8
json_decode in alert-table printer


git-svn-id: http://observium.org/svn/observer/trunk@4414 61d68cd4-352d-0410-923a-c4978735b2b8
show 32/64bit counters on device/edit/ports/


git-svn-id: http://observium.org/svn/observer/trunk@4415 61d68cd4-352d-0410-923a-c4978735b2b8