adblock-fast: update to 1.2.0

adblock-fast: update to 1.2.0

Makefile:
* update version/release
Init Script:
* boot up reliability improvements:
  - change START from 50 to 20 to ensure procd_add_raw_trigger works on boot
  - better logic of checking/using the cache/compressed cache on boot
* new dnsmasq handling/integration logic:
  - new logic for checking dnsmasq functionality (similar to dnsmasq init script)
  - instead of copying/duplicating adblock-fast files per specified dnsmasq instance, create one file
    and add softlinks to it for specified dnsmasq instances and make sure it's in the instance's addnmounts
  - update dnsmasqConfFile, dnsmasqIpsetFile and dnsmasqNftsetFile to point to the same filename as the
    logic for integrating with dnsmasq is the same for those options
  - get the confdir for specified dnsmasq instances via ubus info/config file since the config_get is broken
    between releases by https://github.com/openwrt/openwrt/pull/14975
  - update clean-up procedures for other dns backend settings to properly clean up when switching away from
    dnsmasq.conf, dnsmasq.ipset, dnsmasq.nftset where the new logic is used
  - remove obsolete outputDnsmasqFileList variable and logic of building and using it
  - only create compressed cache in service_started after successful resolver restart with the block-file
* new package config / environment loading logic
  - switch away from using `load_validate_config` to start functions to loading package config "manually"
  - unset boolean variables which are non-true on package config load
  - switch checking values of such variables from `-eq 0` to empty/non-empty
* debugging improvements:
  - rename debug option to debug_init_script and proc_debug to debug_performance
  - output performance debug info to log only when debug_performance is set
* miscellaneous changes:
  - move best dl tool detection into its own function for reuse in adb_config_update
  - change uci_changes function to return 0/1 instead of the text of changes
  - improve mktemp calls reliability by creating the file and not using `-u` anymore
  - add remove_cache/remove_gzip calls to adb_file function
  - better readability of the start_serice logic determining the action
  - change flock value from 207 to 209 to avoid collisions with pbr
  - temporarily switch namespaces when using jshn functions to avoid collisions with PROCD
  - move from using spaces to tabs in indentation in code
  - prevent Command Not Found message on uninstall
  - remove unneeded IPKG_INSTROOT check in the init script
  - update all sourcing instructions to include IPKG_INSTROOT in the path
Uci-defaults script:
* transition old debug and proc_debug options to debug_init_script/debug_performance

Signed-off-by: Stan Grishin <[email protected]>