Pull request 1979: AG-25263 filtering config

Squashed commit of the following:

commit a5607f811ab4642a0e34d3042240e3a9aafc3d84
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Aug 30 15:44:26 2023 +0300

    home: upgrade yaml

commit 0593e4da17613b8770c4567fdd5fbfde31631e6f
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Aug 30 15:01:14 2023 +0300

    home: upgrade yaml

commit 59ec4ba0bbe59fb2e95290f4f8101891ce4ff959
Merge: 6555941f5 a325c9b6b
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Aug 30 14:57:41 2023 +0300

    Merge remote-tracking branch 'origin/master' into AG-25263-filtering-config

    # Conflicts:
    #	internal/dnsforward/http.go
    #	internal/dnsforward/http_test.go
    #	internal/dnsforward/process.go
    #	internal/dnsforward/process_internal_test.go

commit 6555941f57e99aa8bc2473b8be9e4f096ce665e0
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Aug 30 14:38:01 2023 +0300

    docs: changelog

commit c66d14cecbb1f08869a90c46e58d08ec03e29de5
Merge: a50ff1622 aac36a2d2
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Aug 30 12:58:41 2023 +0300

    Merge remote-tracking branch 'origin/master' into AG-25263-filtering-config

commit a50ff162291f7953912c1bb195bd7b5d802d0ab3
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Wed Aug 30 11:22:12 2023 +0300

    home: imp code

commit ef40d073e00d6acb164c0d680ed9971c4e75fbb7
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Aug 29 16:19:14 2023 +0300

    home: imp code

commit 5fa09a95e901a72dc5d2a90ba47c96842152587b
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Aug 29 14:47:48 2023 +0300

    home: imp code

commit 52bb295120f468faf94c953d0e795d1d58696ef1
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Aug 29 13:33:01 2023 +0300

    home: imp code

commit 24cfccf071385d660aeba4ced744ebbacc819686
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Aug 29 12:24:20 2023 +0300

    filtering: imp code

commit 758242b69ee5f351b25407340f989ec6b90d3607
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Tue Aug 29 10:32:51 2023 +0300

    home: imp code

commit 906deaa3bf86af5038fb05a54c34cc9511500ac9
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Aug 28 14:46:01 2023 +0300

    dnsforward: imp code

commit 978bb508349cd0b6a1a0bd3df5b879b6a4dd9e29
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Aug 28 14:40:31 2023 +0300

    home: imp code

commit d5b8dd5c930b0ccbe612f320a9908f2849370fd4
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Aug 28 12:34:32 2023 +0300

    filtering: imp code

commit d3e5726df6bc93112329ec81bc83932ccf64b8de
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Aug 28 11:57:33 2023 +0300

    home: upgrade yaml

commit 75d701553595786d5695540c001e6d46153351a9
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Aug 28 11:46:55 2023 +0300

    home: upgrade yaml

commit cd8cb623b0e6eb00fd05fb62b7445ca4315b94e0
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Aug 28 11:29:16 2023 +0300

    docs: changelog

commit 31c098d6f8d68a4afa30246c8d067a1ef4586de9
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Mon Aug 28 11:08:48 2023 +0300

    docs: changelog

commit 24c88dd5d42b0168a13ea11b3f760eae1e804558
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Sun Aug 27 19:12:55 2023 +0300

    home: imp code

commit 94f2d386c9c1b6be5df06525078c90a3d068641f
Author: Dimitry Kolyshev <dkolyshev@adguard.com>
Date:   Sun Aug 27 16:15:05 2023 +0300

    home: upgrade yaml

... and 10 more commits

internal/dnsforward/dnsforward.go

@@ -45,6 +45,14 @@ var defaultBootstrap = []string{"9.9.9.10", "149.112.112.10", "2620:fe::10", "26
 // Often requested by all kinds of DNS probes
 var defaultBlockedHosts = []string{"version.bind", "id.server", "hostname.bind"}
 
+var (
+	// defaultUDPListenAddrs are the default UDP addresses for the server.
+	defaultUDPListenAddrs = []*net.UDPAddr{{Port: 53}}
+
+	// defaultTCPListenAddrs are the default TCP addresses for the server.
+	defaultTCPListenAddrs = []*net.TCPAddr{{Port: 53}}
+)
+
 var webRegistered bool
 
 // DHCP is an interface for accesing DHCP lease data needed in this package.
@@ -255,11 +263,11 @@ func (s *Server) Close() {
 }
 
 // WriteDiskConfig - write configuration
-func (s *Server) WriteDiskConfig(c *FilteringConfig) {
+func (s *Server) WriteDiskConfig(c *Config) {
 	s.serverLock.RLock()
 	defer s.serverLock.RUnlock()
 
-	sc := s.conf.FilteringConfig
+	sc := s.conf.Config
 	*c = sc
 	c.RatelimitWhitelist = stringutil.CloneSlice(sc.RatelimitWhitelist)
 	c.BootstrapDNS = stringutil.CloneSlice(sc.BootstrapDNS)
@@ -534,7 +542,11 @@ func (s *Server) setupLocalResolvers() (err error) {
 func (s *Server) Prepare(conf *ServerConfig) (err error) {
 	s.conf = *conf
 
-	err = validateBlockingMode(s.conf.BlockingMode, s.conf.BlockingIPv4, s.conf.BlockingIPv6)
+	err = validateBlockingMode(
+		s.dnsFilter.BlockingMode,
+		s.dnsFilter.BlockingIPv4,
+		s.dnsFilter.BlockingIPv6,
+	)
 	if err != nil {
 		return fmt.Errorf("checking blocking mode: %w", err)
 	}
@@ -645,15 +657,18 @@ func (s *Server) setupAddrProc() {
 }
 
 // validateBlockingMode returns an error if the blocking mode data aren't valid.
-func validateBlockingMode(mode BlockingMode, blockingIPv4, blockingIPv6 netip.Addr) (err error) {
+func validateBlockingMode(
+	mode filtering.BlockingMode,
+	blockingIPv4, blockingIPv6 netip.Addr,
+) (err error) {
 	switch mode {
 	case
-		BlockingModeDefault,
-		BlockingModeNXDOMAIN,
-		BlockingModeREFUSED,
-		BlockingModeNullIP:
+		filtering.BlockingModeDefault,
+		filtering.BlockingModeNXDOMAIN,
+		filtering.BlockingModeREFUSED,
+		filtering.BlockingModeNullIP:
 		return nil
-	case BlockingModeCustomIP:
+	case filtering.BlockingModeCustomIP:
 		if !blockingIPv4.Is4() {
 			return fmt.Errorf("blocking_ipv4 must be valid ipv4 on custom_ip blocking_mode")
 		} else if !blockingIPv6.Is6() {