tools: Add testnet4 support for reckless and hsmtool

Changelog-Added: Support for Bitcoin `testnet4`

Author: ShahanaFarooqui

tools/hsmtool.c

@@ -860,7 +860,7 @@ int main(int argc, char *argv[])
 			     next);
 		}
 
-		if (net && (streq(net, "testnet") || streq(net, "signet")))
+		if (net && (streq(net, "testnet") || streq(net, "testnet4") || streq(net, "signet")))
 			version = BIP32_VER_TEST_PRIVATE;
 		else if (net && !streq(net, "bitcoin"))
 			errx(ERROR_USAGE, "Network '%s' not supported."

tools/reckless

@@ -1757,7 +1757,7 @@ if __name__ == '__main__':
 
     NETWORK = 'regtest' if args.regtest else 'bitcoin'
     SUPPORTED_NETWORKS = ['bitcoin', 'regtest', 'liquid', 'liquid-regtest',
-                          'litecoin', 'signet', 'testnet']
+                          'litecoin', 'signet', 'testnet', 'testnet4']
     if args.version:
         report_version()
     elif args.cmd1 is None: