r4070 update: 802.1Q template editor now supports single-submit edit and concerns...

r4070 update: 802.1Q template editor now supports single-submit edit and concerns concurrent submits

inc/ophandlers.php:
 -addVSTRule: unneeded op removed (no more ops for single rule)
 -delVSTRule: idem
 +cloneVSTRule: template cloning code moved to 'clone' op, uses common commitUpdateVSTRules
 updVSTRule: function redesigned to update whole template, not the single rule. Takes input data as text in json format. Uses common commitUpdateVSTRules.

inc/navigation.php: [editrules]add/del removed, clone added, tab renamed from 'Rules' to 'Edit'

inc/interface.php:
 global $port_role_options moved to database.php
 renderVSTRules: code to render read-only rules list, separated from renderVST
 renderVST: uses new renderVSTRules
 renderVSTRulesEditor: redesigned to render new JS-based VST editor.

inc/database.php:
 $port_role_options moved from interfaces.php
 getVLANSwitchTemplate: selects new fields from VLANSwitchTemplate table
 commitUpdateVSTRules: new function, replaces all the rules in the VST. Updates mutex and author in VLANSwitchTemplate.

inc/functions.php:
 isInteger: new function to check values to be integer. returns BOOL.
 isPCRE: idem for PCRE

upgrade.php: new columns 'mutex_rev' and 'saved_by' in VLANSwitchTemplate table
install/init-structure.sql: idem