[24.10] pbr: update to 1.2.0-r2

[stangri]

Maintainer: me
Compile tested: x86_64, Dell EMC Edge 620, OpenWrt 24.10.3
Run tested: x86_64, Dell EMC Edge 620, OpenWrt 24.10.3

Description:
Makefile:

• stop shipping/dealing with the firewall hotplug (obsolete)
• install a third user-script (dnsprefetch) by @Betonmischer

Config:

• remove obsolete options
• include the new user script

Init-script:

• start much earlier so that on boot, the procd_add_raw_trigger works on all systems
• create a ubus() helper function so that service delete does not produce "Command not found"
• rename options to better reflect their function:
  • procd_lan_device to lan_device
  • procd_wan_interface to uplink_interface
  • procd_wan6_interface to uplink_interface6
  • procd_wan6_metric to uplink_interface6_metric
  • wan_ip_rules_priority to uplink_ip_rules_priority
  • wan_mark to uplink_mark
• visually separate run-time variables from variables loaded from config options
• use ${IPKG_INSTROOT} when sourcing files in case it will ever run on build host in the future
• fix typo in str_to_dnsmasq_nftset()
• use pidof to kill dnsmasq in dnsmasq_kill()
• add helper function uci_add_list_if_new()
• add helper function uci_changes()
• add helper function ubus() so that service delete does not produce "Command not found"
• implement the dnsmasq features check similar to dnsmasq init script
• add get_url() function similar to luci package
• add/modify error and warning messages
• change how mktemp is used for more reliable file creation
• unset non-true boolean package config options on load for easier checks later
• improve handling of nft/nft set options
• fewer calls to resolver() and resolver() optimization to speed up the service
• use softlinks instead of duplicating dnsmasq nftset files into each instance
• prevent duplication of dnsmasq nftset elements
• option to target a specific dest dns port in DNS policies
• bugfix: more reliable interface reloads
• display README links to errors/warnings sections if any errors/warnings discovered

Uci-defaults:

• transition from old options to new ones

(cherry picked from commit 3edde10)