Adding HTTPS resource type

[maltris]

Supported since PowerDNS 4.4, this adds the HTTPS resource type to dns-ui

[maltris]

I even came up with a regex that pretty much can verify the integrity of the HTTPS record:

^\b(0|[1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])\b\h(\.|\b((?=.{1,255}$)(?:xn\-\-)?(?!-)(?!.*--)[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?(?:\.[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?)*\.?)\b)(?:\.)?(?!=)(\h(([a-z0-9-]{1,63})((\=\")[\x21\x23-\x27\x2A-\x3A\x3C-\x7E]{1,255}+(\"))?)?)*?$

If you cannot fully follow it, dont worry, because I cannot either.