OPNSense/core 28cc0dcsrc/etc/inc interfaces.inc, src/etc/rc.syshook.d/early 98_carp_maintenance

CARP, kill vague advskew legacy hook when starting in maintenance mode (virtualip_carp_maintenancemode), closes https://github.com/opnsense/core/issues/3671
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+10-0src/etc/rc.syshook.d/early/98_carp_maintenance
+1-6src/etc/inc/interfaces.inc
+11-62 files

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