fix(ns-threat_shield): update DNS feed format

The adblock package 4.5.5-r3 introduced a strict validation requiring
feed rules to start with the word 'feed'. Previously, awk-style rules
were supported but now cause feeds to be silently dropped.

Update both DNS source files to use the new 'feed 1' format:
- community-dns.sources: 8 feeds using '/^[^#]/ { print }'
- nethesis-dns.sources: 4 feeds using complex awk validation regex

Author: gsanchietti

packages/ns-threat_shield/files/community-dns.sources

@@ -1,56 +1,56 @@
 {
 	"malware_lvl2": {
 		"url": "https://bl.nethesis.it/plain/community/free/malware_lvl2.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Threat Intelligence Feed",
 		"descurl": "www.nethesis.it"
 	},
 	"malware_privacy_lvl2": {
 		"url": "https://bl.nethesis.it/plain/community/free/malware_privacy_lvl2.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Multi Light: malware & privacy",
 		"descurl": "www.nethesis.it"
 	},
 	"malware_privacy_lvl3": {
 		"url": "https://bl.nethesis.it/plain/community/free/malware_privacy_lvl3.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Multi Normal: malware and privacy",
 		"descurl": "www.nethesis.it"
 	},
 	"malware_privacy_lvl4": {
 		"url": "https://bl.nethesis.it/plain/community/free/malware_privacy_lvl4.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Multi Pro: malware and privacy",
 		"descurl": "www.nethesis.it"
 	},
 	"adult": {
 		"url": "https://bl.nethesis.it/plain/community/free/adult.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Adult",
 		"descurl": "www.nethesis.it"
 	},
 	"doh_vpn_tor_proxy": {
 		"url": "https://bl.nethesis.it/plain/community/free/doh_vpn_tor_proxy.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Prevent DNS bypass",
 		"descurl": "www.nethesis.it"
 	},
 	"gambling": {
 		"url": "https://bl.nethesis.it/plain/community/free/gambling.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Gambling",
 		"descurl": "www.nethesis.it"
 	},
 	"piracy": {
 		"url": "https://bl.nethesis.it/plain/community/free/piracy.dns",
-		"rule": "/^[^#]/ { print }",
+		"rule": "feed 1",
 		"size": "XXL",
 		"focus": "Piracy",
 		"descurl": "www.nethesis.it"

packages/ns-threat_shield/files/nethesis-dns.sources

@@ -1,28 +1,28 @@
 {
         "yoroi_malware_level1": {
                 "url": "https://__USER__:__PASSWORD__@bl.nethesis.it/plain/__TYPE__/nethesis-blacklists/yoroi_malware_level1.dns",
-                "rule": "/^([[:alnum:]_-]{1,63}\\.)+[[:alpha:]]+([[:space:]]|$)/{print tolower($1)}",
+                "rule": "feed 1",
                 "size": "XL",
                 "focus": "malware",
                 "descurl": "https://www.nethesis.it"
         },
         "yoroi_malware_level2": {
                 "url": "https://__USER__:__PASSWORD__@bl.nethesis.it/plain/__TYPE__/nethesis-blacklists/yoroi_malware_level2.dns",
-                "rule": "/^([[:alnum:]_-]{1,63}\\.)+[[:alpha:]]+([[:space:]]|$)/{print tolower($1)}",
+                "rule": "feed 1",
                 "size": "XL",
                 "focus": "malware",
                 "descurl": "https://www.nethesis.it"
         },
         "yoroi_susp_level1": {
                 "url": "https://__USER__:__PASSWORD__@bl.nethesis.it/plain/__TYPE__/nethesis-blacklists/yoroi_suspicious_level1.dns",
-                "rule": "/^([[:alnum:]_-]{1,63}\\.)+[[:alpha:]]+([[:space:]]|$)/{print tolower($1)}",
+                "rule": "feed 1",
                 "size": "XL",
                 "focus": "malware",
                 "descurl": "https://www.nethesis.it"
         },
         "yoroi_susp_level2": {
                 "url": "https://__USER__:__PASSWORD__@bl.nethesis.it/plain/__TYPE__/nethesis-blacklists/yoroi_suspicious_level2.dns",
-                "rule": "/^([[:alnum:]_-]{1,63}\\.)+[[:alpha:]]+([[:space:]]|$)/{print tolower($1)}",
+                "rule": "feed 1",
                 "size": "XL",
                 "focus": "malware",
                 "descurl": "https://www.nethesis.it"