`.js` should not be processed as TLD

[Alex-302]

Sample rules from AdGuard DNS filter:

.3.n.2.1.l50.js
||113.17.188.*.js
.n.2.1.js^

Original issue: https://github.com/AdguardTeam/AdGuardSDNSFilter/issues/1224 https://github.com/AdguardTeam/AdGuardSDNSFilter/issues/1243

[DandelionSprout]

In theory, the same would apply to .png, .jpg, .jpeg, .webp, .gif, .mp4, .swf, .mp3, .avi, .ogg, .flac, .mkv, and .json, but personally I'd be wary of disqualifying such entries unless they end with ^ or |, or if it's a pure domain entry that starts with a letter or number.

Of the ones above, I know I've come across at least .gif, .jpg, and swf from time to time when converting lists into DNS lists.